Mobilizon.Federation.ActivityPub.Transmogrifier.do_handle_incoming_accept_join_group

Called by:

• Mobilizon.Federation.ActivityPub.Transmogrifier.do_handle_incoming_accept_join (L816)
• Mobilizon.Federation.ActivityPub.Transmogrifier.do_handle_incoming_accept_join (L819)
• Mobilizon.Federation.ActivityPub.Transmogrifier.do_handle_incoming_accept_join (L822)