While working on .NET Core\’s Identity files, I encounter this error: No IUserTwoFactorTokenProvider<TUser> named \’Default\’ is registered.
The Microsoft.AspNetCore.Identity.UserManager<TUser>.GenerateEmailConfirmationTokenAsync or GenerateUserTokenAsync functions couldn\’t generate a token because no provider was available upon registering a new user.
It\’s a very simple fix, just add a little bit more to AddIdentityCore<User> configuration in Startup.cs class services. The fix is to add the AddDefaultTokenProviders().
services.AddIdentityCore<User>(options =>
{
options.Password.RequireNonAlphanumeric = false;
options.User.RequireUniqueEmail = true;
options.SignIn.RequireConfirmedEmail = true;
})
.AddRoles<Role>()
.AddRoleManager<RoleManager<Role>>()
.AddSignInManager<SignInManager<User>>()
.AddRoleValidator<RoleValidator<Role>>()
.AddEntityFrameworkStores<DataContext>()
.AddDefaultTokenProviders();
Build the solutions and try again.