Program.cs

using APIProducao.Context;
using APIProducao.Services;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.EntityFrameworkCore;
using Microsoft.IdentityModel.Tokens;
using System.Text;
using System.Text.Json.Serialization;
using APIProducao.Repository.Interfaces;
using APIProducao.Repository;
using AutoMapper;
using APIProducao.DTO.Mappings;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.

builder.Services.AddControllers()
    .AddJsonOptions(options => 
        options.JsonSerializerOptions
        .ReferenceHandler = ReferenceHandler.IgnoreCycles);

// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();

string npgsqlconnection = builder.Configuration.GetConnectionString("DefaultConnection");
builder.Services.AddDbContext<AppDbContext>(options => options.UseNpgsql(npgsqlconnection));
builder.Services.AddScoped<IUnitOfWork, UnitOfWork>();

var mappingConfig = new MapperConfiguration(mc =>
{
    mc.AddProfile(new MappingProfile());

});

IMapper mapper = mappingConfig.CreateMapper();
builder.Services.AddSingleton(mapper);

builder.Services.AddSingleton<ITokenService>(new TokenService());

builder.Services.AddAuthentication
    (JwtBearerDefaults.AuthenticationScheme)
    .AddJwtBearer(options =>
    {
        options.TokenValidationParameters = new TokenValidationParameters
        {
            ValidateIssuer = true,
            ValidateAudience = true,
            ValidateLifetime = true,
            ValidateIssuerSigningKey = true,

            ValidIssuer = builder.Configuration["Jwt:Issuer"],
            ValidAudience = builder.Configuration["Jwt:Audience"],
            IssuerSigningKey = new SymmetricSecurityKey
            (Encoding.UTF8.GetBytes(builder.Configuration["Jwt:Key"]))
        };
    });

builder.Services.AddAuthorization();

var app = builder.Build();

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI();
}

app.UseHttpsRedirection();

app.UseAuthorization();

app.MapControllers();

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