You can add collaborating users with google accounts in the administrator permissions panel. But you cannot check / guarantee if they use two step verification? An option two make two step verification mandatory for collaborating users is needed.
Can you check for two step verification in the user service? -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-appengine/-/0WgZiBrji-UJ. To post to this group, send email to google-appengine@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
