Added Id property for the UserLoggedModel
Moved the comming code in the BaseApiController.

Also added empty MessagesController and MessageSendModel
Implemented SendMessage service

1) SenderId property in the MessageSendModel was removed
2) Route for the MessagesController added in the WebApiConfig.cs
Added GET services in the MessagesController

1) GetSendMessages() - return the sent messages
2) GetReceviedMessages() - returns the received messages
2) GetAllMessages() - returns all messages for the current user