Logging into Quay via OIDC fails with the verified email claim error

Issue

• Logging into Quay via OIDC when Azure is used as the OIDC provider fails with the following message:

  "A verified email address is required to login with this service."
  

  along with the following exception visible in Quay logs:

  gunicorn-web stdout | 2024-05-22 15:17:19,194 [220] [DEBUG] [oauth.login_utils] Found e-mail address `None` for sub `SOME_SUB`
  gunicorn-web stdout | 2024-05-22 15:17:19,194 [220] [ERROR] [endpoints.oauth.login] Got login exception
  gunicorn-web stdout | Traceback (most recent call last):
  gunicorn-web stdout |   File "/quay-registry/endpoints/oauth/login.py", line 121, in callback_func
  gunicorn-web stdout |     lid, lusername, lemail, additional_info = login_service.exchange_code_for_login(
  gunicorn-web stdout |   File "/quay-registry/oauth/oidc.py", line 195, in exchange_code_for_login
  gunicorn-web stdout |     return get_sub_username_email_from_token(
  gunicorn-web stdout |   File "/quay-registry/oauth/login_utils.py", line 93, in get_sub_username_email_from_token
  gunicorn-web stdout |     raise OAuthLoginException(
  gunicorn-web stdout | oauth.login.OAuthLoginException: A verified email address is required to login with this service