Program.cs

using StoreAppAPI.DataSet;
using Microsoft.EntityFrameworkCore;
using Microsoft.AspNetCore.Builder;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Hosting;
using System;
using System.Configuration;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.EntityFrameworkCore.Metadata.Internal;
using Microsoft.IdentityModel.Tokens;
using System.Text;

namespace StoreAppAPI
{
    public class Program
    {
        public static void Main(string[] args)
        {
            var builder = WebApplication.CreateBuilder(args);

            // Add services to the container.

            builder.Services.AddControllers();
            // Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
            builder.Services.AddEndpointsApiExplorer();
            builder.Services.AddSwaggerGen();
            builder.Services.AddDbContext<ApplicationDbContext>(options => options.UseSqlServer(builder.Configuration.GetConnectionString("DefaultConnection")));
            builder.Services.AddCors(p => p.AddPolicy("corspolicy", build => build.AllowAnyOrigin().AllowAnyMethod().AllowAnyHeader()));
            builder.Services.AddAutoMapper(AppDomain.CurrentDomain.GetAssemblies());
            //builder.Services.AddControllers().AddNewtonsoftJson();
            builder.Services.AddAuthentication(x =>
            {
                x.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
                x.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
                x.DefaultScheme = JwtBearerDefaults.AuthenticationScheme;
            }).AddJwtBearer(y =>
            {
                y.RequireHttpsMetadata = false;
                y.SaveToken = false;
                y.TokenValidationParameters = new TokenValidationParameters
                {
                    ValidateIssuerSigningKey = true,
                    IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes("1234567890123456...")),
                    ValidateIssuer = false,
                    ValidateAudience = false,
                    ClockSkew = TimeSpan.Zero,
                };
            });

            var app = builder.Build();

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

            app.UseHttpsRedirection();
            app.UseAuthentication();
            app.UseAuthorization();
            app.MapControllers();

            app.Run();
        }
    }

    public class JWTSettings
    {
        public string SecretKey { get; set; }
    }
}