如何在asp.net Core3.1应用程序中设定用户和角色的种子？

using Microsoft.AspNetCore.Identity;
using System.Linq;

public static class SeedData
{
    public static void SeedUsersAndRoles(UserManager<IdentityUser> userManager, RoleManager<IdentityRole> roleManager)
    {
        SeedRoles(roleManager);
        SeedUsers(userManager);
    }

    private static void SeedRoles(RoleManager<IdentityRole> roleManager)
    {
        if (!roleManager.RoleExistsAsync("Admin").Result)
        {
            IdentityRole role = new IdentityRole
            {
                Name = "Admin"
            };

            IdentityResult roleResult = roleManager.CreateAsync(role).Result;
        }

        // 添加其他角色的种子数据
    }

    private static void SeedUsers(UserManager<IdentityUser> userManager)
    {
        if (userManager.FindByNameAsync("admin").Result == null)
        {
            IdentityUser user = new IdentityUser
            {
                UserName = "admin",
                Email = "admin@example.com"
            };

            IdentityResult result = userManager.CreateAsync(user, "P@ssw0rd").Result;

            if (result.Succeeded)
            {
                userManager.AddToRoleAsync(user, "Admin").Wait();
            }
        }

        // 添加其他用户的种子数据
    }
}

public void Configure(IApplicationBuilder app, IWebHostEnvironment env, UserManager<IdentityUser> userManager, RoleManager<IdentityRole> roleManager)
{
    // 其他配置代码

    SeedData.SeedUsersAndRoles(userManager, roleManager);

    // 其他配置代码
}