I've got a mysterious problem with OAuth accessing https://spi-tools-dev.toolforge.org/. I have a new feature in beta test, which I'm gating by whitelisting the usernames of my testers.

User:Girth Summit https://en.wikipedia.org/wiki/User:Girth_Summit reported being unable to access the feature, and the problem turned out to be that he's apparently being authenticated as "GirthSummit" (no space). As far as I can tell, that's not a valid username https://meta.wikimedia.org/wiki/Special:CentralAuth/GirthSummit, yet it's what I'm getting back from my django/social-auth authentication flow. Anybody have any idea what might be going on?

I have three whitelisted users; he's the only one with a space in their username.