[gdm-list] GDM Choooser button

["molchan molchan" <molchan_i ukr net>]

Good day, GNOME Developers.

I have spent a lot of time in attempt to add Chooser button in GDM login screen. But without success.
I have GDM 2.28.2 now.

Please tell me, is it possibly to add this feature in GDM login screen? How it can be done?
This functionality is critical for me.

Hope very much for your help.

Best regards,
Ivan Molchan.