If I sign up with Google that uses email E, and then with Github that uses same email E, Github doesn't work

[Martinsos]

Github login just returns me back to login/ screen, and I can't log in with Github, if I already logged in previously with Google which has same email address.

I know that accounts won't get merged, but I would expect to either have new account crated, or to get a useful error message.

It seems this is caused by the fact that email on User entity has unique on it.

[vincanger]

removed the unique constraint in the most recent commit