Startup.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using DBProject.Data;
using DBProject.Models;
using DBProject.Services;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.HttpsPolicy;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using Microsoft.IdentityModel.Tokens;
using Newtonsoft.Json;

namespace DBProject
{
    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddCors(options =>
            {
                options.AddDefaultPolicy(builder =>
                {
                    builder.WithOrigins("http://localhost:3000", "https://localhost")
                            .AllowAnyHeader()
                            .AllowAnyMethod();
                });
            });
            services.AddControllers().AddNewtonsoftJson();
            
            services.Configure<TokenManagement>(Configuration.GetSection("TokenManagement"));
            var token = Configuration.GetSection("TokenManagement").Get<TokenManagement>();
            services.AddAuthentication(x =>
            {
                x.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
                x.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
            }).AddJwtBearer(x =>
            {
                x.RequireHttpsMetadata = false;
                x.SaveToken = true;
                x.TokenValidationParameters = new TokenValidationParameters
                {
                    ValidateIssuerSigningKey = true,
                    IssuerSigningKey = new SymmetricSecurityKey(Encoding.ASCII.GetBytes(token.Secret)),
                    ValidIssuer = token.Issuer,
                    ValidAudience = token.Audience,
                    ValidateIssuer = false,
                    ValidateAudience = false
                };
            });

            services.AddScoped<IAuthenticateService, TokenAuthenticationService>();
            services.AddScoped<IUserService, UserService>();
            services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();

            services.AddDbContext<JournalistContext>(options =>
                options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));

            services.AddDbContext<EditorContext>(options =>
                    options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));

            services.AddDbContext<ImageContext>(options =>
                    options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));

            services.AddDbContext<NewsContext>(options =>
                    options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));

            
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            

            app.UseHttpsRedirection();

            app.UseAuthentication();

            app.UseRouting();

            app.UseCors();

            app.UseAuthorization();

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