DeprecationWarning `callable is None` raised since 3.5 throwing TypeError. Fixed the assertion.
Change to map first name to edx username by default oauth SSO with `identityserver3` backend ENT-2709 Addressed reviewer's feedback
* Add IdentityServer3 Backend This adds a backend for users who want to use IdentityServer3 as their SSO provider. It can be used with the OAuth2ProviderConfig in django admin to point to an external provider.
