Program.cs

using Microsoft.AspNetCore.Identity;
using Microsoft.EntityFrameworkCore;
using ActiveHub.Data;
using ActiveHub.Models;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
var connectionString = builder.Configuration.GetConnectionString("DefaultConnection") ??
                       throw new InvalidOperationException("Connection string 'DefaultConnection' not found.");
builder.Services.AddDbContext<ApplicationDbContext>(options =>
    options.UseSqlite(connectionString));
builder.Services.AddDatabaseDeveloperPageExceptionFilter();

builder.Services.AddDefaultIdentity<ApplicationUser>(options =>
    {
        options.SignIn.RequireConfirmedAccount = false;
        options.SignIn.RequireConfirmedEmail = false;
        options.SignIn.RequireConfirmedPhoneNumber = false;
        options.Password.RequireDigit = false;
        options.Password.RequireLowercase = false;
        options.Password.RequireUppercase = false;
        options.Password.RequireNonAlphanumeric = false;
        options.Password.RequiredLength = 6;
    })
    .AddRoles<IdentityRole>()
    .AddEntityFrameworkStores<ApplicationDbContext>();
builder.Services.AddControllersWithViews();

var app = builder.Build();

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.UseMigrationsEndPoint();
}
else
{
    app.UseExceptionHandler("/Home/Error");
    // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
    app.UseHsts();
}

app.UseHttpsRedirection();
app.UseRouting();

app.UseAuthorization();

app.MapStaticAssets();

app.MapControllerRoute(
        name: "default",
        pattern: "{controller=Home}/{action=Index}/{id?}")
    .WithStaticAssets();

app.MapRazorPages()
    .WithStaticAssets();
using (var scope = app.Services.CreateScope())
{
    var roleManager = scope.ServiceProvider.GetRequiredService<RoleManager<IdentityRole>>();
    var userManager = scope.ServiceProvider.GetRequiredService<UserManager<ApplicationUser>>();

    string adminRoleName = "Admin";

    //create admin role if it doesn't exist
    if (!await roleManager.RoleExistsAsync(adminRoleName))
    {
        await roleManager.CreateAsync(new IdentityRole(adminRoleName));
    }

    //create a default "SuperAdmin" user
    string superAdminEmail = "admin@fitpro.com";
    string superAdminPassword = "Sekret7!";

    var superAdminUser = await userManager.FindByEmailAsync(superAdminEmail);

    if (superAdminUser == null)
    {
        superAdminUser = new ApplicationUser
        {
            UserName = superAdminEmail,
            Email = superAdminEmail,
            FirstName = "Super",
            LastName = "Admin"
        };
        var createUserResult = await userManager.CreateAsync(superAdminUser, superAdminPassword);

        if (createUserResult.Succeeded)
        {
            await userManager.AddToRoleAsync(superAdminUser, adminRoleName);
        }
    }
}
app.Run();