A Python Tracker user posted this:

'There are so many bug trackers around, and it's a big hassle asking
someone to manage a site-specific username+password just to submit a bug
report.'

To that I add that being able to share logins (OpenID, Google ID,
whatever) makes integration of different services much easier, allowing
richer feature sets.

E.g., I'm integrating our Tracker to Rietveld and any advanced
interaction (simultaneous changes, synchronizing patches) would require
the user to authenticate twice.

I might have time to work on this, but I know next to nothing about
authentication and could use some guidance :)

BTW, the user himself didn't submit this ticket... because he'd need yet
another login ;)