GitHub provider fails with 401 on email when scope is missing

[aeneasr]

Describe the bug

The GitHub provider fails with a 401 error, the user is redirected to the system error page. Instead,

Reproducing the bug

Most likely configure the github provider without the email scope, then login, then update config, then login again.

[aeneasr]

This has been fixed with the introduction of Jsonnet because the behavior is now modifiable in the Jsonnet file (e.g. raise error which would cause this behavior, set a default, ask the user to set the value, ...)