"Always Allow" doesn't work

Lately I'm constantly being asked to re-input my version control credentials. I always click the "Always Allow" button, but "always" seems to mean "about a week", after which I'm prompted again.


I've been using Xcode about 9 years, and this is the first year I've noticed this problem.


Has something changed in Xcode and/or Mac OS that is causing this? Is there anything I can do about it?


Thanks,

Frank