seddonmedia/cakephp-oauth-server — pull request #9 by iamcam (2012-06-29 01:04:40+00:00)
Title: Allow the plugin to play nicely with UUIDs for the user_id

It appears the oauth-php library already supports the user_id = string, so this was a matter of updating validation rules to allow non-int (actually non-empty) user_id fields in the oauth tables.