While I was trying to use the social account feature of the module, I noticed that the feature is not implemented properly in some places or does not work at all in some scenarios.

• When attempting to log in for the first time via an unconnected network account, the user model is not saved in the database.
• The SocialNetworkServices require an "id" field in the received data packet. More flexibility is provided by adapting the interface and providing a trait for backwards compatibility.
• New property that allows login exclusively via social networks, regardless of the value of the "enableRegistration" property.
• New property that allows you to prevent the sending of a "welcome message" when the user registers via a social network.

This PR solves these problems and at the same time provides a little more flexibility in use.