Adds CreatorAlias User responses

src/Web/Features/Creators/Handlers/GetCreatorByAlias.cs

@@ -1,12 +1,28 @@
 using FastEndpoints;
+using FluentValidation;
 using Hutopy.Application.Common.Interfaces;
 using Hutopy.Application.Common.Models;
 
 namespace Hutopy.Web.Features.Creators.Handlers;
 
+public sealed class GetCreatorByAliasRequest
+{
+    public string CreatorAlias { get; set; }
+}
+
+public sealed class GetCreatorByAliasRequestValidator
+    : Validator<GetCreatorByAliasRequest>
+{
+    public GetCreatorByAliasRequestValidator()
+    {
+        RuleFor(r => r.CreatorAlias)
+            .NotNull().WithMessage("You must specify a creator-alias");
+    }
+}
+
 public class GetCreatorByAlias(
     IIdentityService identityService)
-    : EndpointWithoutRequest<UserModel?>
+    : Endpoint<GetCreatorByAliasRequest, UserModel?>
 {
     public override void Configure()
     {
@@ -16,13 +32,12 @@ public class GetCreatorByAlias(
     }
 
     public override async Task HandleAsync(
+        GetCreatorByAliasRequest req,
         CancellationToken ct)
     {
-        var creatorAlias = Route<string>("CreatorAlias");
-
-        ArgumentException.ThrowIfNullOrEmpty(creatorAlias);
-
-        var user = await identityService.FindUserByCreatorAliasAsync(creatorAlias, ct);
+        var user = await identityService.FindUserByCreatorAliasAsync(
+            req.CreatorAlias,
+            ct);
 
         await SendAsync(user, cancellation: ct);
     }