尝试激活“AuthenticateController”时无法解析“Microsoft.AspNetCore.Identity.UserManager”类型的服务

Question

I'm getting this error in Login Controller.

System.InvalidOperationException: Unable to resolve service for type 'Microsoft.AspNetCore.Identity.UserManager`1[UsersAuth.IdentityAuth.UserApplication]' while attempting to activate 'UsersAuth.Controllers.AuthenticateController'.

here is Authenticate Controller constructor:

public class AuthenticateController : ControllerBase
    {
        private readonly UserManager<UserApplication> _userManager;
        private readonly RoleManager<IdentityRole> _roleManager;
        private readonly IConfiguration _configuration;

        public AuthenticateController(UserManager<UserApplication> userManager, RoleManager<IdentityRole> roleManager, IConfiguration configuration)
        {
            _userManager = userManager;
            _roleManager = roleManager;
            _configuration = configuration;
        }

and here is ConfigureServices in startup.cs:

public void ConfigureServices(IServiceCollection services)
{
    services.AddControllers();

    services.AddDbContext<ApplicationDbContext>(options=>options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));

    services.AddAuthentication(options =>
    {
        options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
        options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
        options.DefaultScheme = JwtBearerDefaults.AuthenticationScheme;
     })
     .AddJwtBearer(options =>
     {
         options.SaveToken = true;
         options.RequireHttpsMetadata = false;
         options.TokenValidationParameters = new TokenValidationParameters()
         {
             ValidateIssuer = true,
             ValidateAudience = true,
             ValidIssuer = Configuration["JWT:ValidIssuer"],
             ValidAudience = Configuration["JWT:ValidAudience"],
             IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(Configuration["JWT:SecretKey"]))
         };
     });
}

Answer 1

You didn't configure Dependency Injection for UserApplication . There are different ways to do that, for example

services.AddDefaultIdentity<UserApplication>(options =>
   options.SignIn.RequireConfirmedAccount = true)
   .AddEntityFrameworkStores<ApplicationDbContext>();

or, if you want more granular control,

services.AddIdentityCore<AppUser>(opt => {
    opt.Password.RequiredLength = 8;
    ...
})
.AddSignInManager()
.AddRoles<IdentityRole>();

Answer 2

I would comment but I don't have rep yet to do it so here it goes: Is UserManager class your creation? I don't see a call registering it in IServiceCollection to be resolved when constructing your controller.

An example registration for you UserManager could look like this:

public void ConfigureServices(IServiceCollection services)
{
    services.AddControllers();

    services.AddScoped<UserManager<UserApplication>>();

    // other registrations follow
}