Not possible to add user after he tried Github Oauth without being created locally

[Lineflyer]

While installing and configuring the plugin recently I have a problem. Not sure, whether a bug or a logical mistake on my side:

• Oauth plugin configured (towards Github) and activated
• Self registration is diabled on the Dokuwiki
• Github user tries to authenticate before I add him as a user locally
• He is correctly rejected (as his mail address is not among the existing users) and self registration is disabled
• Go to user management and create the user using his Github email address

Result: I get an error message, that this mail address is already in use, although it is definitely not shown in the table of users. Thus I cannot create the user account on Dokuwiki.

Workaround:

• Go back from "oauth" to "Authplain"
• Create the user (no error message this time)
• Re-enable "oauth"

Am I doing something wrong? It seems like trying to authenticate stores the Github users email address somewhere in the background, where it blocks creation of a user account with the same email address afterwards.

In fact I cannot prevent users from trying to login via Oauth before I created their accounts. But each time someone tries, I have problems to create him as a user afterwards.

[Lineflyer]

After browsing the issues here I think it is related to PR #47