Login with PhoneNumber

[Arthus15]

In some cases could be interesting to login a user using his phone number instead of the username/email.
This could be done in the client service, but it would be interesed to include it on the library.

Extra: Also email != username then email could be a desired parameter in some cases.

As an idea to develop this functionality the service could expose a method like:

Task<TUser> Login(string id, string password, LoginTypeEnum loginType);