Fixed errors on website loading

Fixed the errors that occurred on initial website load by moving the initial user creation in the DBContext and not in the ASP.NET project

RentACar/WebApp/Areas/Identity/Pages/Account/Register.cshtml.cs

@@ -95,7 +95,7 @@ namespace WebApp.Areas.Identity.Pages.Account
             ExternalLogins = (await _signInManager.GetExternalAuthenticationSchemesAsync()).ToList();
             if (ModelState.IsValid)
             {
-                var user = new User { Id = Guid.NewGuid().ToString(), UserName = Input.UserName, Email = Input.Email, FirstName = Input.FirstName, LastName = Input.LastName, PhoneNumber = Input.PhoneNumber, PersonalNumber = Input.EGN, IsAdmin = Input.IsAdmin};
+                var user = new User { Id = Guid.NewGuid().ToString(), UserName = Input.UserName, Email = Input.Email, FirstName = Input.FirstName, LastName = Input.LastName, PhoneNumber = Input.PhoneNumber, PersonalNumber = Input.EGN};
                 var result = await _userManager.CreateAsync(user, Input.Password);
                 if (result.Succeeded)
                 {