Included Microsoft.Extensions.Identity.Core instead of Microsoft.AspNetCore.Identity
Changed initialisation to return the IdentityBuilder so that the token providers can be set independently
Had to remove AddDefaultTokenProviders as this is part of the AspNet 3.1 framework and not dotnet standard 2.1
* Fixed the unit tests so that they are now passing.
Note: This is my first real introduction to Moq, so there are probably a few things that can be improved.
Changes:
* Had a few issues with the mock logger, ended up adding a LoggerFactory and Logger implementation to work around this issue (for some reason the mock logger was never called and the unit tests failed because the string builder was never updated).
* Accommodated changes to the SignInManager, UserManager where the latest version has added Logging to constructor
* SecurityStamp functions in UserManager now check for null and throws an exception, so the unit tests can no longer call GetSecurityStampAsync before its set. Line 866: https://github.com/dotnet/aspnetcore/blame/605c522fa3e875fd6d3aefa783a71d1745b7e4c7/src/Identity/Extensions.Core/src/UserManager.cs
* SignInManager.RefreshSignInAsync has changed the internal method from s.SignInAsync to SignInWithClaimsAsync
David Barker