Program.cs

using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.IdentityModel.Tokens;
using System.Text;
using System.Text.Json.Serialization;
using WebApiExercisio;
using WebApiExercisio.Data;
using WebApiExercisio.Services;

var builder = WebApplication.CreateBuilder(args);
ConfigureAuthentication(builder);

builder.Services.AddControllers()

.ConfigureApiBehaviorOptions(options => { options.SuppressModelStateInvalidFilter = true; })
.AddJsonOptions(x =>
        {
            x.JsonSerializerOptions.ReferenceHandler = ReferenceHandler.IgnoreCycles;
            x.JsonSerializerOptions.DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingDefault;
        });


builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();
builder.Services.AddTransient<TokenService>();


builder.Services.AddDbContext<AppDbContext>(options =>
{
    options.UseSqlServer(builder.Configuration.GetConnectionString("DefaultConnection"));
});

var app = builder.Build();

if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI();
}

app.UseHttpsRedirection();

app.UseAuthentication();
app.UseAuthorization();

app.MapControllers();

app.Run();


void ConfigureAuthentication(WebApplicationBuilder builder)
{
    var key = Encoding.ASCII.GetBytes(Settings.Secret);
    builder.Services.AddAuthentication(x =>
    {
        x.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
        x.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
    }).AddJwtBearer(x =>
    {
        x.TokenValidationParameters = new TokenValidationParameters
        {
            ValidateIssuerSigningKey = true,
            IssuerSigningKey = new SymmetricSecurityKey(key),
            ValidateIssuer = false,
            ValidateAudience = false
        };
    });
}