Continuing the discussion from What exactly does "client.sync_sso" do? (Discourse Ruby API):
https://github.com/discourse/discourse_api/blob/master/lib/discourse_api/api/users.rb#L13-L16
Calls /admin/users/USERNAME, which doesn’t seem to exist. That’s a bug, right? It looks like that route requires the user_id to be included before username.
Is this correct @sam?
Yeah looks buggy probably created prior to us refactoring admin routes
Show me the love! At this rate, I’m never going to get my Tester badge. 
(This is my second confirmed bug that didn’t get liked. 
)
Can we fix this @blake – looks easy?
Okay fixed!
https://github.com/discourse/discourse_api/commit/c82519ffb398c56e14f9331a6b550dad4bcb6f20
Install the latest version of the gem (0.16.1) and you will get the update.