diff --git a/src/Bot/Model/Entity/Bot.php b/src/Bot/Model/Entity/Bot.php
index 5154c2d..44cd5dd 100644
--- a/src/Bot/Model/Entity/Bot.php
+++ b/src/Bot/Model/Entity/Bot.php
@@ -138,7 +138,7 @@ class Bot implements ModelInterface
     /**
      * @return string
      */
-    public function getId(): string
+    public function getId(): ?string
     {
         return $this->id;
     }
@@ -154,7 +154,7 @@ class Bot implements ModelInterface
     /**
      * @return \DateTime
      */
-    public function getCreatedAt(): \DateTime
+    public function getCreatedAt(): ?\DateTime
     {
         return $this->createdAt;
     }
@@ -170,7 +170,7 @@ class Bot implements ModelInterface
     /**
      * @return \DateTime
      */
-    public function getUpdatedAt(): \DateTime
+    public function getUpdatedAt(): ?\DateTime
     {
         return $this->updatedAt;
     }
@@ -186,7 +186,7 @@ class Bot implements ModelInterface
     /**
      * @return string
      */
-    public function getName(): string
+    public function getName(): ?string
     {
         return $this->name;
     }
@@ -202,7 +202,7 @@ class Bot implements ModelInterface
     /**
      * @return array
      */
-    public function getEvents(): array
+    public function getEvents(): ?array
     {
         return $this->events;
     }
@@ -218,7 +218,7 @@ class Bot implements ModelInterface
     /**
      * @return string
      */
-    public function getClientId(): string
+    public function getClientId(): ?string
     {
         return $this->clientId;
     }
@@ -234,7 +234,7 @@ class Bot implements ModelInterface
     /**
      * @return string
      */
-    public function getAvatarUrl(): string
+    public function getAvatarUrl(): ?string
     {
         return $this->avatarUrl;
     }
@@ -250,7 +250,7 @@ class Bot implements ModelInterface
     /**
      * @return array
      */
-    public function getRoles(): array
+    public function getRoles(): ?array
     {
         return $this->roles;
     }
@@ -266,7 +266,7 @@ class Bot implements ModelInterface
     /**
      * @return string
      */
-    public function getDeactivatedAt(): string
+    public function getDeactivatedAt(): ?string
     {
         return $this->deactivatedAt;
     }
@@ -282,7 +282,7 @@ class Bot implements ModelInterface
     /**
      * @return bool
      */
-    public function isActive(): bool
+    public function isActive(): ?bool
     {
         return $this->isActive;
     }
@@ -298,7 +298,7 @@ class Bot implements ModelInterface
     /**
      * @return bool
      */
-    public function isSelf(): bool
+    public function isSelf(): ?bool
     {
         return $this->isSelf;
     }
@@ -314,7 +314,7 @@ class Bot implements ModelInterface
     /**
      * @return bool
      */
-    public function isSystem(): bool
+    public function isSystem(): ?bool
     {
         return $this->isSystem;
     }
diff --git a/src/Bot/Model/Entity/Channel/Channel.php b/src/Bot/Model/Entity/Channel/Channel.php
index 63a5bbf..01bbe20 100644
--- a/src/Bot/Model/Entity/Channel/Channel.php
+++ b/src/Bot/Model/Entity/Channel/Channel.php
@@ -103,7 +103,7 @@ class Channel implements ModelInterface
     /**
      * @return string
      */
-    public function getId(): string
+    public function getId(): ?string
     {
         return $this->id;
     }
@@ -119,7 +119,7 @@ class Channel implements ModelInterface
     /**
      * @return \DateTime
      */
-    public function getCreatedAt(): DateTime
+    public function getCreatedAt(): ?DateTime
     {
         return $this->createdAt;
     }
@@ -135,7 +135,7 @@ class Channel implements ModelInterface
     /**
      * @return \DateTime
      */
-    public function getUpdatedAt(): DateTime
+    public function getUpdatedAt(): ?DateTime
     {
         return $this->updatedAt;
     }
@@ -151,7 +151,7 @@ class Channel implements ModelInterface
     /**
      * @return \DateTime
      */
-    public function getActivatedAt(): DateTime
+    public function getActivatedAt(): ?DateTime
     {
         return $this->activatedAt;
     }
@@ -167,7 +167,7 @@ class Channel implements ModelInterface
     /**
      * @return \DateTime
      */
-    public function getDeactivatedAt(): DateTime
+    public function getDeactivatedAt(): ?DateTime
     {
         return $this->deactivatedAt;
     }
@@ -183,7 +183,7 @@ class Channel implements ModelInterface
     /**
      * @return bool
      */
-    public function isActive(): bool
+    public function isActive(): ?bool
     {
         return $this->isActive;
     }
@@ -199,7 +199,7 @@ class Channel implements ModelInterface
     /**
      * @return ChannelSettings
      */
-    public function getSettings(): ChannelSettings
+    public function getSettings(): ?ChannelSettings
     {
         return $this->settings;
     }
@@ -215,7 +215,7 @@ class Channel implements ModelInterface
     /**
      * @return string
      */
-    public function getType(): string
+    public function getType(): ?string
     {
         return $this->type;
     }
@@ -231,7 +231,7 @@ class Channel implements ModelInterface
     /**
      * @return string
      */
-    public function getName(): string
+    public function getName(): ?string
     {
         return $this->name;
     }
diff --git a/src/Bot/Model/Entity/Channel/ChannelSettings.php b/src/Bot/Model/Entity/Channel/ChannelSettings.php
index 306824c..c9bb3b9 100644
--- a/src/Bot/Model/Entity/Channel/ChannelSettings.php
+++ b/src/Bot/Model/Entity/Channel/ChannelSettings.php
@@ -92,7 +92,7 @@ class ChannelSettings implements ModelInterface
     /**
      * @return ChannelSettingsStatus
      */
-    public function getStatus(): ChannelSettingsStatus
+    public function getStatus(): ?ChannelSettingsStatus
     {
         return $this->status;
     }
@@ -108,7 +108,7 @@ class ChannelSettings implements ModelInterface
     /**
      * @return bool
      */
-    public function isSpamAllowed(): bool
+    public function isSpamAllowed(): ?bool
     {
         return $this->spamAllowed;
     }
@@ -124,7 +124,7 @@ class ChannelSettings implements ModelInterface
     /**
      * @return ChannelSettingsItem
      */
-    public function getText(): ChannelSettingsItem
+    public function getText(): ?ChannelSettingsItem
     {
         return $this->text;
     }
@@ -140,7 +140,7 @@ class ChannelSettings implements ModelInterface
     /**
      * @return ChannelSettingsItem
      */
-    public function getProduct(): ChannelSettingsItem
+    public function getProduct(): ?ChannelSettingsItem
     {
         return $this->product;
     }
@@ -156,7 +156,7 @@ class ChannelSettings implements ModelInterface
     /**
      * @return ChannelSettingsItem
      */
-    public function getOrder(): ChannelSettingsItem
+    public function getOrder(): ?ChannelSettingsItem
     {
         return $this->order;
     }
@@ -172,7 +172,7 @@ class ChannelSettings implements ModelInterface
     /**
      * @return ChannelSettingsItem
      */
-    public function getImage(): ChannelSettingsItem
+    public function getImage(): ?ChannelSettingsItem
     {
         return $this->image;
     }
@@ -188,7 +188,7 @@ class ChannelSettings implements ModelInterface
     /**
      * @return ChannelSettingsItem
      */
-    public function getFile(): ChannelSettingsItem
+    public function getFile(): ?ChannelSettingsItem
     {
         return $this->file;
     }
diff --git a/src/Bot/Model/Entity/Channel/ChannelSettingsItem.php b/src/Bot/Model/Entity/Channel/ChannelSettingsItem.php
index 2581ec7..ba74828 100644
--- a/src/Bot/Model/Entity/Channel/ChannelSettingsItem.php
+++ b/src/Bot/Model/Entity/Channel/ChannelSettingsItem.php
@@ -103,7 +103,7 @@ class ChannelSettingsItem implements ModelInterface
     /**
      * @return string
      */
-    public function getCreating(): string
+    public function getCreating(): ?string
     {
         return $this->creating;
     }
@@ -119,7 +119,7 @@ class ChannelSettingsItem implements ModelInterface
     /**
      * @return string
      */
-    public function getEditing(): string
+    public function getEditing(): ?string
     {
         return $this->editing;
     }
@@ -135,7 +135,7 @@ class ChannelSettingsItem implements ModelInterface
     /**
      * @return string
      */
-    public function getQuoting(): string
+    public function getQuoting(): ?string
     {
         return $this->quoting;
     }
@@ -151,7 +151,7 @@ class ChannelSettingsItem implements ModelInterface
     /**
      * @return string
      */
-    public function getDeleting(): string
+    public function getDeleting(): ?string
     {
         return $this->deleting;
     }
@@ -167,7 +167,7 @@ class ChannelSettingsItem implements ModelInterface
     /**
      * @return string
      */
-    public function getDelivered(): string
+    public function getDelivered(): ?string
     {
         return $this->delivered;
     }
@@ -183,7 +183,7 @@ class ChannelSettingsItem implements ModelInterface
     /**
      * @return int
      */
-    public function getMaxCharsCount(): int
+    public function getMaxCharsCount(): ?int
     {
         return $this->maxCharsCount;
     }
@@ -199,7 +199,7 @@ class ChannelSettingsItem implements ModelInterface
     /**
      * @return int
      */
-    public function getMaxItemsCount(): int
+    public function getMaxItemsCount(): ?int
     {
         return $this->maxItemsCount;
     }
@@ -215,7 +215,7 @@ class ChannelSettingsItem implements ModelInterface
     /**
      * @return int
      */
-    public function getNoteMaxCharsCount(): int
+    public function getNoteMaxCharsCount(): ?int
     {
         return $this->noteMaxCharsCount;
     }
diff --git a/src/Bot/Model/Entity/Channel/ChannelSettingsStatus.php b/src/Bot/Model/Entity/Channel/ChannelSettingsStatus.php
index f82dd38..bc09fbb 100644
--- a/src/Bot/Model/Entity/Channel/ChannelSettingsStatus.php
+++ b/src/Bot/Model/Entity/Channel/ChannelSettingsStatus.php
@@ -49,7 +49,7 @@ class ChannelSettingsStatus implements ModelInterface
     /**
      * @return string
      */
-    public function getDelivered(): string
+    public function getDelivered(): ?string
     {
         return $this->delivered;
     }
@@ -65,7 +65,7 @@ class ChannelSettingsStatus implements ModelInterface
     /**
      * @return string
      */
-    public function getRead(): string
+    public function getRead(): ?string
     {
         return $this->read;
     }
diff --git a/src/Bot/Model/Entity/Chat/Chat.php b/src/Bot/Model/Entity/Chat/Chat.php
index 35abaaa..ddd679d 100644
--- a/src/Bot/Model/Entity/Chat/Chat.php
+++ b/src/Bot/Model/Entity/Chat/Chat.php
@@ -138,7 +138,7 @@ class Chat implements ModelInterface
     /**
      * @return \DateTime
      */
-    public function getCreatedAt(): \DateTime
+    public function getCreatedAt(): ?\DateTime
     {
         return $this->createdAt;
     }
@@ -154,7 +154,7 @@ class Chat implements ModelInterface
     /**
      * @return \DateTime
      */
-    public function getUpdatedAt(): \DateTime
+    public function getUpdatedAt(): ?\DateTime
     {
         return $this->updatedAt;
     }
@@ -170,7 +170,7 @@ class Chat implements ModelInterface
     /**
      * @return string
      */
-    public function getAvatar(): string
+    public function getAvatar(): ?string
     {
         return $this->avatar;
     }
@@ -186,7 +186,7 @@ class Chat implements ModelInterface
     /**
      * @return string
      */
-    public function getName(): string
+    public function getName(): ?string
     {
         return $this->name;
     }
@@ -202,7 +202,7 @@ class Chat implements ModelInterface
     /**
      * @return Channel
      */
-    public function getChannel(): Channel
+    public function getChannel(): ?Channel
     {
         return $this->channel;
     }
@@ -218,7 +218,7 @@ class Chat implements ModelInterface
     /**
      * @return array
      */
-    public function getMembers(): array
+    public function getMembers(): ?array
     {
         return $this->members;
     }
@@ -234,7 +234,7 @@ class Chat implements ModelInterface
     /**
      * @return Customer
      */
-    public function getCustomer(): Customer
+    public function getCustomer(): ?Customer
     {
         return $this->customer;
     }
@@ -250,7 +250,7 @@ class Chat implements ModelInterface
     /**
      * @return int
      */
-    public function getAuthorId(): int
+    public function getAuthorId(): ?int
     {
         return $this->authorId;
     }
@@ -266,7 +266,7 @@ class Chat implements ModelInterface
     /**
      * @return ChatLastMessage
      */
-    public function getLastMessage(): ChatLastMessage
+    public function getLastMessage(): ?ChatLastMessage
     {
         return $this->lastMessage;
     }
@@ -282,7 +282,7 @@ class Chat implements ModelInterface
     /**
      * @return \DateTime
      */
-    public function getLastActivity(): \DateTime
+    public function getLastActivity(): ?\DateTime
     {
         return $this->lastActivity;
     }
diff --git a/src/Bot/Model/Entity/Chat/ChatLastMessage.php b/src/Bot/Model/Entity/Chat/ChatLastMessage.php
index 5dbba92..8986bc0 100644
--- a/src/Bot/Model/Entity/Chat/ChatLastMessage.php
+++ b/src/Bot/Model/Entity/Chat/ChatLastMessage.php
@@ -74,7 +74,7 @@ class ChatLastMessage implements ModelInterface
     /**
      * @return \DateTime
      */
-    public function getTime(): \DateTime
+    public function getTime(): ?\DateTime
     {
         return $this->time;
     }
@@ -90,7 +90,7 @@ class ChatLastMessage implements ModelInterface
     /**
      * @return string
      */
-    public function getType(): string
+    public function getType(): ?string
     {
         return $this->type;
     }
diff --git a/src/Bot/Model/Entity/Chat/ChatMember.php b/src/Bot/Model/Entity/Chat/ChatMember.php
index bb0ffe4..ffe7f5e 100644
--- a/src/Bot/Model/Entity/Chat/ChatMember.php
+++ b/src/Bot/Model/Entity/Chat/ChatMember.php
@@ -108,7 +108,7 @@ class ChatMember implements ModelInterface
     /**
      * @return \DateTime
      */
-    public function getCreatedAt(): \DateTime
+    public function getCreatedAt(): ?\DateTime
     {
         return $this->createdAt;
     }
@@ -124,7 +124,7 @@ class ChatMember implements ModelInterface
     /**
      * @return \DateTime
      */
-    public function getUpdatedAt(): \DateTime
+    public function getUpdatedAt(): ?\DateTime
     {
         return $this->updatedAt;
     }
@@ -140,7 +140,7 @@ class ChatMember implements ModelInterface
     /**
      * @return int
      */
-    public function getChatId(): int
+    public function getChatId(): ?int
     {
         return $this->chatId;
     }
@@ -156,7 +156,7 @@ class ChatMember implements ModelInterface
     /**
      * @return int
      */
-    public function getUserId(): int
+    public function getUserId(): ?int
     {
         return $this->userId;
     }
@@ -172,7 +172,7 @@ class ChatMember implements ModelInterface
     /**
      * @return bool
      */
-    public function isAuthor(): bool
+    public function isAuthor(): ?bool
     {
         return $this->isAuthor;
     }
@@ -188,7 +188,7 @@ class ChatMember implements ModelInterface
     /**
      * @return string
      */
-    public function getState(): string
+    public function getState(): ?string
     {
         return $this->state;
     }
diff --git a/src/Bot/Model/Entity/Command.php b/src/Bot/Model/Entity/Command.php
index c251a7c..d66db12 100644
--- a/src/Bot/Model/Entity/Command.php
+++ b/src/Bot/Model/Entity/Command.php
@@ -74,7 +74,7 @@ class Command implements ModelInterface
     /**
      * @return string
      */
-    public function getId(): string
+    public function getId(): ?string
     {
         return $this->id;
     }
@@ -90,7 +90,7 @@ class Command implements ModelInterface
     /**
      * @return \DateTime
      */
-    public function getCreatedAt(): \DateTime
+    public function getCreatedAt(): ?\DateTime
     {
         return $this->createdAt;
     }
@@ -106,7 +106,7 @@ class Command implements ModelInterface
     /**
      * @return \DateTime
      */
-    public function getUpdatedAt(): \DateTime
+    public function getUpdatedAt(): ?\DateTime
     {
         return $this->updatedAt;
     }
@@ -122,7 +122,7 @@ class Command implements ModelInterface
     /**
      * @return string
      */
-    public function getName(): string
+    public function getName(): ?string
     {
         return $this->name;
     }
@@ -138,7 +138,7 @@ class Command implements ModelInterface
     /**
      * @return string
      */
-    public function getDescription(): string
+    public function getDescription(): ?string
     {
         return $this->description;
     }
diff --git a/src/Bot/Model/Entity/Customer.php b/src/Bot/Model/Entity/Customer.php
index 9151a06..b856801 100644
--- a/src/Bot/Model/Entity/Customer.php
+++ b/src/Bot/Model/Entity/Customer.php
@@ -176,7 +176,7 @@ class Customer implements ModelInterface
     /**
      * @return string
      */
-    public function getId(): string
+    public function getId(): ?string
     {
         return $this->id;
     }
@@ -192,7 +192,7 @@ class Customer implements ModelInterface
     /**
      * @return \DateTime
      */
-    public function getCreatedAt(): \DateTime
+    public function getCreatedAt(): ?\DateTime
     {
         return $this->createdAt;
     }
@@ -208,7 +208,7 @@ class Customer implements ModelInterface
     /**
      * @return \DateTime
      */
-    public function getUpdatedAt(): \DateTime
+    public function getUpdatedAt(): ?\DateTime
     {
         return $this->updatedAt;
     }
@@ -224,7 +224,7 @@ class Customer implements ModelInterface
     /**
      * @return string
      */
-    public function getExternalId(): string
+    public function getExternalId(): ?string
     {
         return $this->externalId;
     }
@@ -240,7 +240,7 @@ class Customer implements ModelInterface
     /**
      * @return int
      */
-    public function getChannelId(): int
+    public function getChannelId(): ?int
     {
         return $this->channelId;
     }
@@ -256,7 +256,7 @@ class Customer implements ModelInterface
     /**
      * @return string
      */
-    public function getUsername(): string
+    public function getUsername(): ?string
     {
         return $this->username;
     }
@@ -272,7 +272,7 @@ class Customer implements ModelInterface
     /**
      * @return string
      */
-    public function getFirstName(): string
+    public function getFirstName(): ?string
     {
         return $this->firstName;
     }
@@ -288,7 +288,7 @@ class Customer implements ModelInterface
     /**
      * @return string
      */
-    public function getLastName(): string
+    public function getLastName(): ?string
     {
         return $this->lastName;
     }
@@ -304,7 +304,7 @@ class Customer implements ModelInterface
     /**
      * @return string
      */
-    public function getAvatarUrl(): string
+    public function getAvatarUrl(): ?string
     {
         return $this->avatarUrl;
     }
@@ -320,7 +320,7 @@ class Customer implements ModelInterface
     /**
      * @return string
      */
-    public function getProfileUrl(): string
+    public function getProfileUrl(): ?string
     {
         return $this->profileUrl;
     }
@@ -336,7 +336,7 @@ class Customer implements ModelInterface
     /**
      * @return string
      */
-    public function getRevokedAt(): string
+    public function getRevokedAt(): ?string
     {
         return $this->revokedAt;
     }
@@ -352,7 +352,7 @@ class Customer implements ModelInterface
     /**
      * @return string
      */
-    public function getCountry(): string
+    public function getCountry(): ?string
     {
         return $this->country;
     }
@@ -368,7 +368,7 @@ class Customer implements ModelInterface
     /**
      * @return string
      */
-    public function getLanguage(): string
+    public function getLanguage(): ?string
     {
         return $this->language;
     }
@@ -384,7 +384,7 @@ class Customer implements ModelInterface
     /**
      * @return string
      */
-    public function getPhone(): string
+    public function getPhone(): ?string
     {
         return $this->phone;
     }
@@ -400,7 +400,7 @@ class Customer implements ModelInterface
     /**
      * @return string
      */
-    public function getEmail(): string
+    public function getEmail(): ?string
     {
         return $this->email;
     }
diff --git a/src/Bot/Model/Entity/Dialog.php b/src/Bot/Model/Entity/Dialog.php
index 679e518..f0679b6 100644
--- a/src/Bot/Model/Entity/Dialog.php
+++ b/src/Bot/Model/Entity/Dialog.php
@@ -128,7 +128,7 @@ class Dialog implements ModelInterface
     /**
      * @return string
      */
-    public function getId(): string
+    public function getId(): ?string
     {
         return $this->id;
     }
@@ -144,7 +144,7 @@ class Dialog implements ModelInterface
     /**
      * @return \DateTime
      */
-    public function getCreatedAt(): \DateTime
+    public function getCreatedAt(): ?\DateTime
     {
         return $this->createdAt;
     }
@@ -160,7 +160,7 @@ class Dialog implements ModelInterface
     /**
      * @return \DateTime
      */
-    public function getUpdatedAt(): \DateTime
+    public function getUpdatedAt(): ?\DateTime
     {
         return $this->updatedAt;
     }
@@ -176,7 +176,7 @@ class Dialog implements ModelInterface
     /**
      * @return int
      */
-    public function getBotId(): int
+    public function getBotId(): ?int
     {
         return $this->botId;
     }
@@ -192,7 +192,7 @@ class Dialog implements ModelInterface
     /**
      * @return int
      */
-    public function getChatId(): int
+    public function getChatId(): ?int
     {
         return $this->chatId;
     }
@@ -208,7 +208,7 @@ class Dialog implements ModelInterface
     /**
      * @return int
      */
-    public function getBeginMessageId(): int
+    public function getBeginMessageId(): ?int
     {
         return $this->beginMessageId;
     }
@@ -224,7 +224,7 @@ class Dialog implements ModelInterface
     /**
      * @return int
      */
-    public function getEndingMessageId(): int
+    public function getEndingMessageId(): ?int
     {
         return $this->endingMessageId;
     }
@@ -240,7 +240,7 @@ class Dialog implements ModelInterface
     /**
      * @return \DateTime
      */
-    public function getClosedAt(): \DateTime
+    public function getClosedAt(): ?\DateTime
     {
         return $this->closedAt;
     }
@@ -256,7 +256,7 @@ class Dialog implements ModelInterface
     /**
      * @return bool
      */
-    public function isAssigned(): bool
+    public function isAssigned(): ?bool
     {
         return $this->isAssigned;
     }
@@ -272,7 +272,7 @@ class Dialog implements ModelInterface
     /**
      * @return Responsible
      */
-    public function getResponsible(): Responsible
+    public function getResponsible(): ?Responsible
     {
         return $this->responsible;
     }
@@ -288,7 +288,7 @@ class Dialog implements ModelInterface
     /**
      * @return bool
      */
-    public function isActive(): bool
+    public function isActive(): ?bool
     {
         return $this->isActive;
     }
diff --git a/src/Bot/Model/Entity/FileMeta.php b/src/Bot/Model/Entity/FileMeta.php
index 3fe81f5..8ee3a88 100644
--- a/src/Bot/Model/Entity/FileMeta.php
+++ b/src/Bot/Model/Entity/FileMeta.php
@@ -49,7 +49,7 @@ class FileMeta implements ModelInterface
     /**
      * @return int
      */
-    public function getHeight(): int
+    public function getHeight(): ?int
     {
         return $this->height;
     }
@@ -65,7 +65,7 @@ class FileMeta implements ModelInterface
     /**
      * @return int
      */
-    public function getWidth(): int
+    public function getWidth(): ?int
     {
         return $this->width;
     }
diff --git a/src/Bot/Model/Entity/Message/Item.php b/src/Bot/Model/Entity/Message/Item.php
index 48dbf32..52cb46f 100644
--- a/src/Bot/Model/Entity/Message/Item.php
+++ b/src/Bot/Model/Entity/Message/Item.php
@@ -74,7 +74,7 @@ class Item implements ModelInterface
     /**
      * @return int
      */
-    public function getSize(): int
+    public function getSize(): ?int
     {
         return $this->size;
     }
diff --git a/src/Bot/Model/Entity/Message/Message.php b/src/Bot/Model/Entity/Message/Message.php
index 9426551..40d972f 100644
--- a/src/Bot/Model/Entity/Message/Message.php
+++ b/src/Bot/Model/Entity/Message/Message.php
@@ -227,7 +227,7 @@ class Message implements ModelInterface
     /**
      * @return \DateTime
      */
-    public function getCreatedAt(): \DateTime
+    public function getCreatedAt(): ?\DateTime
     {
         return $this->createdAt;
     }
@@ -243,7 +243,7 @@ class Message implements ModelInterface
     /**
      * @return \DateTime
      */
-    public function getUpdatedAt(): \DateTime
+    public function getUpdatedAt(): ?\DateTime
     {
         return $this->updatedAt;
     }
@@ -275,7 +275,7 @@ class Message implements ModelInterface
     /**
      * @return array
      */
-    public function getItems(): array
+    public function getItems(): ?array
     {
         return $this->items;
     }
@@ -291,7 +291,7 @@ class Message implements ModelInterface
     /**
      * @return User
      */
-    public function getFrom(): User
+    public function getFrom(): ?User
     {
         return $this->from;
     }
@@ -307,7 +307,7 @@ class Message implements ModelInterface
     /**
      * @return \DateTime
      */
-    public function getTime(): \DateTime
+    public function getTime(): ?\DateTime
     {
         return $this->time;
     }
@@ -323,7 +323,7 @@ class Message implements ModelInterface
     /**
      * @return string
      */
-    public function getType(): string
+    public function getType(): ?string
     {
         return $this->type;
     }
@@ -339,7 +339,7 @@ class Message implements ModelInterface
     /**
      * @return string
      */
-    public function getScope(): string
+    public function getScope(): ?string
     {
         return $this->scope;
     }
@@ -355,7 +355,7 @@ class Message implements ModelInterface
     /**
      * @return int
      */
-    public function getChatId(): int
+    public function getChatId(): ?int
     {
         return $this->chatId;
     }
@@ -371,7 +371,7 @@ class Message implements ModelInterface
     /**
      * @return string
      */
-    public function getContent(): string
+    public function getContent(): ?string
     {
         return $this->content;
     }
@@ -387,7 +387,7 @@ class Message implements ModelInterface
     /**
      * @return bool
      */
-    public function isRead(): bool
+    public function isRead(): ?bool
     {
         return $this->isRead;
     }
@@ -403,7 +403,7 @@ class Message implements ModelInterface
     /**
      * @return bool
      */
-    public function isEdit(): bool
+    public function isEdit(): ?bool
     {
         return $this->isEdit;
     }
@@ -419,7 +419,7 @@ class Message implements ModelInterface
     /**
      * @return string
      */
-    public function getStatus(): string
+    public function getStatus(): ?string
     {
         return $this->status;
     }
@@ -435,7 +435,7 @@ class Message implements ModelInterface
     /**
      * @return string
      */
-    public function getAction(): string
+    public function getAction(): ?string
     {
         return $this->action;
     }
@@ -451,7 +451,7 @@ class Message implements ModelInterface
     /**
      * @return Dialog
      */
-    public function getDialog(): Dialog
+    public function getDialog(): ?Dialog
     {
         return $this->dialog;
     }
@@ -467,7 +467,7 @@ class Message implements ModelInterface
     /**
      * @return int
      */
-    public function getChannelId(): int
+    public function getChannelId(): ?int
     {
         return $this->channelId;
     }
@@ -483,7 +483,7 @@ class Message implements ModelInterface
     /**
      * @return \DateTime
      */
-    public function getChannelSentAt(): \DateTime
+    public function getChannelSentAt(): ?\DateTime
     {
         return $this->channelSentAt;
     }
@@ -499,7 +499,7 @@ class Message implements ModelInterface
     /**
      * @return MessageOrder
      */
-    public function getOrder(): MessageOrder
+    public function getOrder(): ?MessageOrder
     {
         return $this->order;
     }
@@ -515,7 +515,7 @@ class Message implements ModelInterface
     /**
      * @return MessageProduct
      */
-    public function getProduct(): MessageProduct
+    public function getProduct(): ?MessageProduct
     {
         return $this->product;
     }
diff --git a/src/Bot/Model/Entity/Message/MessageOrderPaymentStatus.php b/src/Bot/Model/Entity/Message/MessageOrderPaymentStatus.php
index 2efcb4d..dfe106e 100644
--- a/src/Bot/Model/Entity/Message/MessageOrderPaymentStatus.php
+++ b/src/Bot/Model/Entity/Message/MessageOrderPaymentStatus.php
@@ -49,7 +49,7 @@ class MessageOrderPaymentStatus implements ModelInterface
     /**
      * @return string
      */
-    public function getName(): string
+    public function getName(): ?string
     {
         return $this->name;
     }
@@ -65,7 +65,7 @@ class MessageOrderPaymentStatus implements ModelInterface
     /**
      * @return bool
      */
-    public function getPayed(): bool
+    public function getPayed(): ?bool
     {
         return $this->payed;
     }
diff --git a/src/Bot/Model/Entity/Message/MessageProduct.php b/src/Bot/Model/Entity/Message/MessageProduct.php
index 717c554..e7e648c 100644
--- a/src/Bot/Model/Entity/Message/MessageProduct.php
+++ b/src/Bot/Model/Entity/Message/MessageProduct.php
@@ -110,7 +110,7 @@ class MessageProduct implements ModelInterface
     /**
      * @return string
      */
-    public function getName(): string
+    public function getName(): ?string
     {
         return $this->name;
     }
@@ -126,7 +126,7 @@ class MessageProduct implements ModelInterface
     /**
      * @return string
      */
-    public function getArticle(): string
+    public function getArticle(): ?string
     {
         return $this->article;
     }
@@ -142,7 +142,7 @@ class MessageProduct implements ModelInterface
     /**
      * @return string
      */
-    public function getUrl(): string
+    public function getUrl(): ?string
     {
         return $this->url;
     }
@@ -158,7 +158,7 @@ class MessageProduct implements ModelInterface
     /**
      * @return string
      */
-    public function getImg(): string
+    public function getImg(): ?string
     {
         return $this->img;
     }
@@ -174,7 +174,7 @@ class MessageProduct implements ModelInterface
     /**
      * @return MessageCost
      */
-    public function getCost(): MessageCost
+    public function getCost(): ?MessageCost
     {
         return $this->cost;
     }
@@ -190,7 +190,7 @@ class MessageProduct implements ModelInterface
     /**
      * @return MessageQuantity
      */
-    public function getQuantity(): MessageQuantity
+    public function getQuantity(): ?MessageQuantity
     {
         return $this->quantity;
     }
diff --git a/src/Bot/Model/Entity/Message/MessageStatus.php b/src/Bot/Model/Entity/Message/MessageStatus.php
index 05e293f..95a3048 100644
--- a/src/Bot/Model/Entity/Message/MessageStatus.php
+++ b/src/Bot/Model/Entity/Message/MessageStatus.php
@@ -49,7 +49,7 @@ class MessageStatus implements ModelInterface
     /**
      * @return string
      */
-    public function getCode(): string
+    public function getCode(): ?string
     {
         return $this->code;
     }
@@ -65,7 +65,7 @@ class MessageStatus implements ModelInterface
     /**
      * @return string
      */
-    public function getName(): string
+    public function getName(): ?string
     {
         return $this->name;
     }
diff --git a/src/Bot/Model/Entity/Responsible.php b/src/Bot/Model/Entity/Responsible.php
index 4069368..3c273b3 100644
--- a/src/Bot/Model/Entity/Responsible.php
+++ b/src/Bot/Model/Entity/Responsible.php
@@ -58,7 +58,7 @@ class Responsible implements ModelInterface
     /**
      * @return string
      */
-    public function getAssignedAt(): string
+    public function getAssignedAt(): ?string
     {
         return $this->assignedAt;
     }
@@ -74,7 +74,7 @@ class Responsible implements ModelInterface
     /**
      * @return int
      */
-    public function getId(): int
+    public function getId(): ?int
     {
         return $this->id;
     }
@@ -90,7 +90,7 @@ class Responsible implements ModelInterface
     /**
      * @return string
      */
-    public function getType(): string
+    public function getType(): ?string
     {
         return $this->type;
     }
diff --git a/src/Bot/Model/Entity/User.php b/src/Bot/Model/Entity/User.php
index f80d8ba..8ed189c 100644
--- a/src/Bot/Model/Entity/User.php
+++ b/src/Bot/Model/Entity/User.php
@@ -151,7 +151,7 @@ class User implements ModelInterface
     /**
      * @return string
      */
-    public function getId(): string
+    public function getId(): ?string
     {
         return $this->id;
     }
@@ -167,7 +167,7 @@ class User implements ModelInterface
     /**
      * @return \DateTime
      */
-    public function getCreatedAt(): \DateTime
+    public function getCreatedAt(): ?\DateTime
     {
         return $this->createdAt;
     }
@@ -183,7 +183,7 @@ class User implements ModelInterface
     /**
      * @return \DateTime
      */
-    public function getUpdatedAt(): \DateTime
+    public function getUpdatedAt(): ?\DateTime
     {
         return $this->updatedAt;
     }
@@ -199,7 +199,7 @@ class User implements ModelInterface
     /**
      * @return string
      */
-    public function getExternalId(): string
+    public function getExternalId(): ?string
     {
         return $this->externalId;
     }
@@ -215,7 +215,7 @@ class User implements ModelInterface
     /**
      * @return string
      */
-    public function getType(): string
+    public function getType(): ?string
     {
         return $this->type;
     }
@@ -231,7 +231,7 @@ class User implements ModelInterface
     /**
      * @return string
      */
-    public function getAvatar(): string
+    public function getAvatar(): ?string
     {
         return $this->avatar;
     }
@@ -247,7 +247,7 @@ class User implements ModelInterface
     /**
      * @return string
      */
-    public function getName(): string
+    public function getName(): ?string
     {
         return $this->name;
     }
@@ -263,7 +263,7 @@ class User implements ModelInterface
     /**
      * @return string
      */
-    public function getUsername(): string
+    public function getUsername(): ?string
     {
         return $this->username;
     }
@@ -279,7 +279,7 @@ class User implements ModelInterface
     /**
      * @return string
      */
-    public function getFirstName(): string
+    public function getFirstName(): ?string
     {
         return $this->firstName;
     }
@@ -295,7 +295,7 @@ class User implements ModelInterface
     /**
      * @return string
      */
-    public function getLastName(): string
+    public function getLastName(): ?string
     {
         return $this->lastName;
     }
@@ -311,7 +311,7 @@ class User implements ModelInterface
     /**
      * @return bool
      */
-    public function isActive(): bool
+    public function isActive(): ?bool
     {
         return $this->isActive;
     }
@@ -327,7 +327,7 @@ class User implements ModelInterface
     /**
      * @return bool
      */
-    public function isOnline(): bool
+    public function isOnline(): ?bool
     {
         return $this->isOnline;
     }
@@ -343,7 +343,7 @@ class User implements ModelInterface
     /**
      * @return \DateTime
      */
-    public function getRevokedAt(): \DateTime
+    public function getRevokedAt(): ?\DateTime
     {
         return $this->revokedAt;
     }