Startup.cs

 public void ConfigureServices(IServiceCollection services)
        {
            services.AddDbContext<BlueInkDbContext>(options =>
                options.UseSqlServer(Configuration.GetConnectionString("BlueInkDb")));


            services.AddSingleton<HashingService>();
            services.Configure<AuthenticationSettings>(Configuration.GetSection("AuthenticationSettings"));

            var signingKey = Encoding.UTF8.GetBytes(Configuration.GetSection("AuthenticationSettings")
                                .GetValue<string>("JwtKey"));

            services.AddAuthentication(options =>
            {
                options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
                options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
            }).AddJwtBearer(x =>
            {
                x.RequireHttpsMetadata = false;
                x.SaveToken = true;
                x.TokenValidationParameters = new TokenValidationParameters
                {
                    ValidateIssuerSigningKey = true,
                    IssuerSigningKey = new SymmetricSecurityKey(signingKey),
                    ValidateIssuer = false,
                    ValidateAudience = false
                };
            });

            services.AddMvc()
                .AddNewtonsoftJson();
        }