asp.net core identity custom storage providers

https://docs.microsoft.com/en-us/aspnet/core/security/authentication/identity-custom-storage-providers

stores:
https://github.com/dotnet/aspnetcore/blob/main/src/Identity/Extensions.Core/src/IUserStore.cs
https://github.com/dotnet/aspnetcore/blob/main/src/Identity/Extensions.Core/src/IRoleStore.cs

https://github.com/dotnet/aspnetcore/tree/main/src/Identity/Extensions.Stores/src/UserStoreBase.cs
https://github.com/dotnet/aspnetcore/tree/main/src/Identity/Extensions.Stores/src/RoleStoreBase.cs

https://github.com/dotnet/aspnetcore/tree/main/src/Identity/EntityFrameworkCore/src/UserStore.cs
https://github.com/dotnet/aspnetcore/tree/main/src/Identity/EntityFrameworkCore/src/RoleStore.cs

managers:
https://github.com/dotnet/aspnetcore/blob/main/src/Identity/Extensions.Core/src/UserManager.cs
https://github.com/dotnet/aspnetcore/blob/main/src/Identity/Extensions.Core/src/RoleManager.cs