Error page.

app/views/errors/omniauth_error.html.haml

+%h1.http_status_code 422
+%h3.page-title Sign-in using #{@provider} auth failed
+%hr
+%p Sign-in failed because #{@error}.
+%p There are couple of steps you can take:
+1. Try logging in using your email 
+%br
+2. Try logging in using your username
+%br
+3. If you have forgotten your password, try recovering it using #{ link_to "Password recovery", new_password_path(resource_name) }
+%br
+%p If none of the options work, try contacting the GitLab administrator.