How to configure properly Identity core with DI on net.core 3.1?

Question

I started a pet project on ASP.NET core 3.1 created MVC project and a bunch of libraries to work with.

I also created :

• User,

• Role,

• RoleManager

• UserManager

Classes which are inherited from AspNetCore.Identity. But I've got a problem while including those classes into DI container. Every time i get this InvalidOpertationException with info: Unable to resolve service for type Microsoft.AspNetCore.Identity.IUserStore while attempting to activate JournalUserManager.

Here's my code sample:

`services.AddIdentityCore<JournalUser>(options =>
 {
    options.User.RequireUniqueEmail = true;
    options.Lockout.MaxFailedAccessAttempts = 3;
    options.Password.RequireNonAlphanumeric = false;
    options.Password.RequireUppercase = false;
 })
   .AddRoles<JournalRole>()
   .AddRoleManager<JournalRoleManager>()
   .AddUserManager<JournalUserManager>();`

Any suggestions how to fix it?

Answer 1

Check out the custom storage providers guide

In the Reconfigure app to use a new storage provider there is this example of setting up the IUserStore and the IRoleStore

public void ConfigureServices(IServiceCollection services)
{
    // Add identity types
    services.AddIdentity<ApplicationUser, ApplicationRole>()
        .AddDefaultTokenProviders();

    // Identity Services
    services.AddTransient<IUserStore<ApplicationUser>, CustomUserStore>();
    services.AddTransient<IRoleStore<ApplicationRole>, CustomRoleStore>();
    string connectionString = Configuration.GetConnectionString("DefaultConnection");
    services.AddTransient<SqlConnection>(e => new SqlConnection(connectionString));
    services.AddTransient<DapperUsersTable>();

    // additional configuration
}