Please add a google auth or facebook auth example

[himaghnam]

Please add a google authorization or Facebook authorization example

[novabyte]

@gamergamesz Do you have a Google or Facebook plugin for Godot which you recommend?

[himaghnam]

Fb - https://github.com/guybashan/godot-android-facebook-plugin

[himaghnam]

Google(It does not return token as of right now) - https://github.com/cgisca/PGSGP
Firebase (this token is not working for me ,win10) - https://github.com/yalcin-ata/godot-android-plugin-firebase