create project and customercontroller

AB-API/Program.cs

@@ -2,7 +2,7 @@ var builder = WebApplication.CreateBuilder(args);
 
 // Add services to the container.
 
-builder.Services.AddControllers();
+builder.Services.AddControllers().AddApplicationPart(typeof(AB.API.AssemblyReference).Assembly);
 // Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
 builder.Services.AddEndpointsApiExplorer();
 builder.Services.AddSwaggerGen();