Check whether a session is valid

[JoshuaD84]

After calling

	session = Authenticator.getMobileSession( username, password, key, secret );

Is there a way to check whether that session is valid, and if not, why it failed (i.e. bad username / password, no internet connection, etc.)

Thank you!

[mvmn]

Experimentally found out that it returns null if you use invalid credentials
For connection errors it will probably throw exceptions - got to try with disconnected WiFi