Startup.cs

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.HttpsPolicy;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using Microsoft.OpenApi.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.IdentityModel.Tokens.Jwt;
using System.Text;
using LD_EC_PiaBackEnd.Filters;
using Microsoft.EntityFrameworkCore;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.AspNetCore.Identity;
using Microsoft.IdentityModel.Tokens;

namespace LD_EC_PiaBackEnd
{
    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            JwtSecurityTokenHandler.DefaultInboundClaimTypeMap.Clear();
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }
        
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddControllers(
                options => options.Filters.Add(typeof(GlobalExceptionFilter))).AddJsonOptions(
                x => x.JsonSerializerOptions.ReferenceHandler = System.Text.Json.Serialization.ReferenceHandler.IgnoreCycles).AddNewtonsoftJson();

            services.AddDbContext<ApplicationDbContext>(
                options => options.UseSqlServer(Configuration.GetConnectionString("defaultConnection")));
            services.AddEndpointsApiExplorer();
            
            services.AddSwaggerGen(
                c =>
                {
                    c.SwaggerDoc("v1", new OpenApiInfo { Title = "APICasino", Version = "v1" });

                    c.AddSecurityDefinition("Bearer", new OpenApiSecurityScheme
                    {
                        Name = "Authorization",
                        Type = SecuritySchemeType.ApiKey,
                        Scheme = "Bearer",
                        BearerFormat = "JWT",
                        In = ParameterLocation.Header
                    });

                    c.AddSecurityRequirement(new OpenApiSecurityRequirement
                    {
                        {
                            new OpenApiSecurityScheme
                            {
                                Reference = new OpenApiReference
                                {
                                    Type = ReferenceType.SecurityScheme,
                                    Id = "Bearer"
                                }
                            },
                        new string[]{}
                        }
                    });
                });

            services.AddAuthorization(options =>
            {
                options.AddPolicy("AdminPolicy", policy => policy.RequireClaim("Admin"));
            });

            services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme).AddJwtBearer(options =>
            {
                options.TokenValidationParameters = new TokenValidationParameters
                {
                    ValidateIssuer = false,
                    ValidateAudience = false,
                    ValidateLifetime = true,
                    ValidateIssuerSigningKey = true,
                    IssuerSigningKey = new SymmetricSecurityKey(
                        Encoding.UTF8.GetBytes(Configuration["keyjwt"])
                    ),
                    ClockSkew = TimeSpan.Zero
                };
            });

            services.AddResponseCaching();
            services.AddTransient<GlobalExceptionFilter>();

            services.AddResponseCaching();
            services.AddTransient<GlobalExceptionFilter>();

            services.AddAutoMapper(typeof(Startup));
            services.AddIdentity<IdentityUser, IdentityRole>()
                .AddEntityFrameworkStores<ApplicationDbContext>()
                .AddDefaultTokenProviders();

        }

        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseSwagger();
                app.UseSwaggerUI();
            }

            app.UseHttpsRedirection();

            app.UseResponseCaching();

            app.UseRouting();

            app.UseAuthorization();

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllers();
            });
        }
    }
}