Support CIAM Custom User Domain

Author: rayluo

mysite/settings.py

@@ -20,6 +20,7 @@
     client_credential=os.getenv('CLIENT_SECRET'),
     redirect_uri=os.getenv('REDIRECT_URI'),
     authority=os.getenv('AUTHORITY'),
+    oidc_authority=os.getenv('OIDC_AUTHORITY'),
     b2c_tenant_name=os.getenv('B2C_TENANT_NAME'),
     b2c_signup_signin_user_flow=os.getenv('SIGNUPSIGNIN_USER_FLOW'),
     b2c_edit_profile_user_flow=os.getenv('EDITPROFILE_USER_FLOW'),