Program.cs

using System.Text;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.IdentityModel.Tokens;
using PhoneBook.Services.ContactServices;
using PhoneBook.Services.TokenServices;
using PhoneBook.Services.UserServices;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddScoped<RegisterUser>();
builder.Services.AddScoped<GenerateTokenService>();
builder.Services.AddScoped<LoginUser>();
builder.Services.AddScoped<GetUserByUsernameAndPasswordService>();
builder.Services.AddScoped<GetContactsByUserId>();
builder.Services.AddScoped<CreateContact>();
builder.Services.AddScoped<GetContactByPhoneNumber>();
builder.Services.AddScoped<DeleteContact>();
builder.Services.AddScoped<UpdateContact>();
builder.Services.AddScoped<AuthenticationHelper>();


builder.Services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme).AddJwtBearer(opt =>
{
    opt.TokenValidationParameters = new TokenValidationParameters{
        ValidateAudience = true,
        ValidateIssuer = true,
        ValidateLifetime = true,
        ValidateIssuerSigningKey = true,
        ValidIssuer = builder.Configuration["Token:Issuer"],
        ValidAudience = builder.Configuration["Token:Audience"],
        IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(builder.Configuration["Token:SecurityKey"])),
        ClockSkew = TimeSpan.Zero
    };
});
builder.Services.AddRazorPages();
builder.Services.AddServerSideBlazor();

var app = builder.Build();

// Configure the HTTP request pipeline.
if (!app.Environment.IsDevelopment())
{
    app.UseExceptionHandler("/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.UseAuthentication();
app.UseHttpsRedirection();

app.UseStaticFiles();

app.UseRouting();

app.MapBlazorHub();
app.MapFallbackToPage("/_Host");

app.Run();