Password reset token provider in ASP.NET core - IUserTokenProvider not found

You can specify one of the built in providers;

services.AddIdentity<User, Role>(options =>{
        options.Tokens.PasswordResetTokenProvider = TokenOptions.DefaultEmailProvider;
    })
    .AddDefaultTokenProviders();

Or create your own IUserTwoFactorTokenProvider and register it like so;

services.AddIdentity<User, Role>(options => {
    options.Tokens.PasswordResetTokenProvider = nameof(MyTokenProvider);
})
.AddTokenProvider<MyTokenProvider>(nameof(MyTokenProvider));

add or correct following lines in startup.cs:

services.AddIdentity<User, UserRole>()
            .AddEntityFrameworkStores<ApplicationDbContext>()
            .AddDefaultTokenProviders();

you can found more description here

I'm not sure if it's workaround or normal approach, but the IUserTwoFactorTokenProvider interface seems to be a right way. IUserTokenProvider appears to no longer exists.

Figured out that I have to register the provider manually in the identity:

services.AddIdentity<User, Role>(options =>
            {
                ...
                options.Tokens.ProviderMap.Add("Default", new TokenProviderDescriptor(typeof(IUserTwoFactorTokenProvider<User>)));
            })

And the optional configuration in ConfigureServices:

services.Configure<DataProtectionTokenProviderOptions>(o =>
        {
            o.Name = "Default";
            o.TokenLifespan = TimeSpan.FromHours(1);
        });

And the password reset / email validation tokens are working now.

PS: Opened an issue for clarification