无法打开登录请求的数据库“身份”。登录失败。用户“DESKTOP\User”登录失败

所以当我尝试运行我的项目时，我一直收到这个错误......该项目是由我的一位小组成员发送给我的。

“无法打开登录请求的数据库“身份”。登录失败。用户登录失败“

该项目本身是一个使用 MVC 的 Web 应用程序。我们有一个包含俱乐部/球员名单的数据库。我目前要做的只是运行它以查看我的小组已完成的工作，但它不断向我显示上述错误。我在网上广泛搜索无济于事，这就是我在这里发帖寻求帮助的原因。

SQL Server 对象资源管理器

以下是：

IdentitySeedData.cs

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Identity;
using Microsoft.Extensions.DependencyInjection;

namespace P0.Models
{
    public static class IdentitySeedData
    {
        private const string adminUser = "Admin";
        private const string adminPassword = "Secret123$";
        public static async void EnsurePopulated(IApplicationBuilder app)
        {
            UserManager<IdentityUser> userManager = app.ApplicationServices
                .GetRequiredService<UserManager<IdentityUser>>();

            IdentityUser user = await userManager.FindByNameAsync(adminUser);

            if (user == null)
            {
                user = new IdentityUser("Admin");
                await userManager.CreateAsync(user);
            }
        }
    }
}

AppIdentityContext.cs

using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Identity.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore;


namespace P0.Models
{
    public class AppIdentityDbContext : IdentityDbContext<IdentityUser>
    {
        public AppIdentityDbContext(DbContextOptions<AppIdentityDbContext> options)
            : base(options) { }
    }
}

程序.cs

using Microsoft.AspNetCore;
using Microsoft.AspNetCore.Hosting;

namespace P0
{
    public class Program
    {
        public static void Main(string[] args)
        {
            BuildWebHost(args).Run();
        }

        public static IWebHost BuildWebHost(string[] args) =>
            WebHost.CreateDefaultBuilder(args)
                .UseStartup<Startup>()
                .UseDefaultServiceProvider(options =>
                options.ValidateScopes = false)
                .Build();
    }
}

启动文件

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.DependencyInjection;
using P0.Models;
using Microsoft.Extensions.Configuration;
using Microsoft.EntityFrameworkCore;
using Microsoft.AspNetCore.Identity;

namespace P0
{
    public class Startup
    {
        public Startup(IConfiguration configuration) =>
            Configuration = configuration;

        public IConfiguration Configuration { get; }
        // This method gets called by the runtime. Use this method to add services to the container.
        // For more information on how to configure your application, visit https://go.microsoft.com/fwlink/?LinkID=398940
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddDbContext<ApplicationDbContext>(options =>
                options.UseSqlServer(
                    Configuration["Data:ConnectionStrings:SoccerClubs"]));
            services.AddDbContext<AppIdentityDbContext>(options =>
                options.UseSqlServer(
                    Configuration["Data:ConnectionStrings:AppIdentityDbContext"]));
            services.AddIdentity<IdentityUser, IdentityRole>()
                .AddEntityFrameworkStores<AppIdentityDbContext>()
                .AddDefaultTokenProviders();
            services.AddTransient<IClubRepository, EFClubRepository>();
            services.AddTransient<IPlayerRepository, EFPlayerRepository>();
            services.AddMvc();
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            app.UseStaticFiles();
            app.UseAuthentication();
            app.UseMvc(routes =>
            {
                routes.MapRoute(
                    name: "default",
                    template: "{controller=Home}/{action=Index}/{id?}");
            });
            SeedData.EnsurePopulated(app);
            IdentitySeedData.EnsurePopulated(app);
        }
    }
}

appsetting.json

{
  "Data": {
    "ConnectionStrings": {
      "SoccerClubs": "Server=(localdb)\\MSSQLLocalDB;Database=SoccerClubs;Trusted_Connection=True;MultipleActiveResultSets=true",
      "AppIdentityDbContext": "Server=(localdb)\\MSSQLLocalDB;Database=Identity;Trusted_Connection=True;MultipleActiveResultSets=true"
    }
    }
}