Вытащил солюшен на уровень выше, чтобы прощё было дотнетить

ApplicationLayer/DependencyInjection.cs

@@ -0,0 +1,35 @@
+using System.Reflection;
+using ApplicationLayer.Services.AuthServices.LoginService;
+using ApplicationLayer.Services.AuthServices.RegisterService;
+using ApplicationLayer.Services.Users;
+using ApplicationLayer.Services.VisaApplications.Handlers;
+using FluentValidation;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace ApplicationLayer;
+
+/// Provides methods to add services to DI-container
+public static class DependencyInjection
+{
+    /// Add services for Application layer
+    public static IServiceCollection AddApplicationLayer(this IServiceCollection services, bool isDevelopment = false)
+    {
+        services.AddValidatorsFromAssembly(Assembly.GetExecutingAssembly());
+
+        services.AddScoped<IVisaApplicationRequestsHandler, VisaApplicationRequestsHandler>();
+
+        services.AddScoped<IRegisterService, RegisterService>();
+        services.AddScoped<IUsersService, UsersService>();
+
+        if (isDevelopment)
+        {
+            services.AddScoped<ILoginService, DevelopmentLoginService>();
+        }
+        else
+        {
+            services.AddScoped<ILoginService, LoginService>();
+        }
+
+        return services;
+    }
+}