Refactoring

The main server owns the migrations, it's the server part,
it's simpler.

It's Yavsc, not one of its lib.

src/Api/Controllers/HairCut/HairCutController.cs

@@ -22,6 +22,7 @@ namespace Yavsc.ApiControllers
     using Microsoft.AspNetCore.Http;
     using Microsoft.EntityFrameworkCore;
     using Microsoft.AspNetCore.Authorization;
+    using Yavsc.Server.Helpers;
 
     [Route("api/haircut")][Authorize]
     public class HairCutController : Controller