[uMap] Github does not work as login provider

[Yohan Boniface]

On 16/11/2015 10:20, Thomas Kalka wrote:
> Ah. Thank you. Login worked now, but I got a strange user handle
> (thoka90b10a9009464a71).

Yeah, another thing that needs to be fixed: you already have another
account with the same login (or someone else), so a new random one has
been used instead.
What needs to be done is a way to attach other auth providers to an
already existing account (but we can't to that automatically, as it
would be a security issue).