Feature request: login_session_file method with optional print function as argument

[tehkillerbee]

To make it easier to integrate python authentication with external python modules, it should be possible to provide an optional print function as argument to the method login_session_file

Originally posted by @GioF71 in #277 (comment)

[GioF71]

Hello, I will gladly implement this. Should I branch from master or from feature/v0.7.7-prep3? Thank you

[tehkillerbee]

Perfect, you can use the latest master as a base 👍

[tehkillerbee]

Fixed in #283