Startup.cs

using DinkToPdf;
using DinkToPdf.Contracts;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.SpaServices.AngularCli;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using AspNetCore.RouteAnalyzer;
using System.Diagnostics;
using think_agro_metrics.Data;
using Microsoft.EntityFrameworkCore;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using Microsoft.IdentityModel.Tokens;

namespace ThinkAgroMetrics {
    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.AddDbContext<DataContext> (options =>
                options.UseSqlServer (Configuration.GetConnectionString ("DefaultConnection")));
            //            
            // Database connection string.
            // Make sure to update the Password value below from "Your_password123" to your actual password.
            //            var connection = @"Server=127.0.0.1,1433;Database=master;Integrated Security=False;User=sa;Password=Password1;MultipleActiveResultSets=True;";

            // This line uses 'UseSqlServer' in the 'options' parameter
            // with the connection string defined above.
            //            services.AddDbContext<DataContext>(
            //                options => options.UseSqlServer(connection));

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

            services.AddMvc ();
            services.AddRouteAnalyzer ();
            // In production, the Angular files will be served from this directory
            services.AddSpaStaticFiles (configuration => {
                configuration.RootPath = "ClientApp/dist";
            });

            services.AddSingleton (typeof (IConverter), new SynchronizedConverter (new PdfTools ()));
        }

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

            app.UseStaticFiles ();
            app.UseSpaStaticFiles ();   
            app.UseAuthentication();

            app.UseMvc (routes => {
                routes.MapRouteAnalyzer ("/routes");
                routes.MapRoute (
                    name: "default",
                    template: "{controller}/{action=Index}/{id?}");
            });

            app.UseSpa (spa => {
                // To learn more about options for serving an Angular SPA from ASP.NET Core,
                // see https://go.microsoft.com/fwlink/?linkid=864501

                spa.Options.SourcePath = "ClientApp";

                if (env.IsDevelopment ()) {
                    spa.UseAngularCliServer (npmScript: "start");
                }
            });
        }
    }
}