Program.cs

using Microsoft.AspNetCore;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.IdentityModel.Tokens;
using Microsoft.EntityFrameworkCore;
using Microsoft.OpenApi.Models;
using WorkingwithSQLLiteinAsp.NETCoreWebAPI.ApplicationDbContext;
using System.Text;

public class Program
{
    public static void Main(string[] args)
    {
        CreateWebHostBuilder(args).Build().Run();
    }

    public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
        WebHost.CreateDefaultBuilder(args)
            .ConfigureAppConfiguration((hostingContext, config) =>
            {
                // Configuration setup if needed
            })
            .ConfigureServices((context, services) =>
            {
                services.AddDbContext<AppDbContext>(options =>
                    options.UseSqlite(context.Configuration.GetConnectionString("DefaultConnection")));

                services.AddControllers();

                // Configure JWT authentication
                services.AddAuthentication(options =>
                {
                    options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
                    options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
                }).AddJwtBearer(options =>
                {
                    options.RequireHttpsMetadata = false; // Set to true in production
                    options.SaveToken = true;
                    options.TokenValidationParameters = new TokenValidationParameters
                    {
                        ValidateIssuerSigningKey = true,
                        IssuerSigningKey = new SymmetricSecurityKey(Encoding.ASCII.GetBytes("9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08")), // Replace with your secret key
                        ValidateIssuer = false,
                        ValidateAudience = false
                    };
                });

                services.AddEndpointsApiExplorer();
                services.AddSwaggerGen(c =>
                {
                    c.SwaggerDoc("v1", new OpenApiInfo { Title = "Working with SQLLite In Asp.net Core Web API", Version = "v1" });
                });
            })
            .Configure((app) =>
            {
                app.UseRouting();

                // CORS policy setup
                app.UseCors(builder =>
                {
                    builder.AllowAnyOrigin()
                           .AllowAnyMethod()
                           .AllowAnyHeader();
                });

                app.UseAuthentication();
                app.UseAuthorization();
                app.UseSwagger();
                app.UseSwaggerUI();

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

            });
            
}