I have a Web application where I am using MembershipReboot to implement authentication. Now I want to use Identity server 4 (with MVC core)to secure this application and an API. I found that We can customize IResourceownerpasswordvalidator and IProfileservice classes to use existing database with identity server. I also see there is membershipreboot sample with identity server 3 but not with identity server 4.
Please suggest what method do I need to use for user authentication using identity server with existing database of membershipreboot.