Thanks 
@Robert Moucha and 
@Jan Soubusta for your responses.
To give some more context, we are using external identity service provider i.e. auth0 and also we are still on 
GD.CN version 1.7. Considering this:
1. What option we will have with auth0 + 
GD.CN 1.7 version?
2. What option we will have with auth0 + 
GD.CN 2.0 version?