Implemented handling of server side issues using the rfc for problem detasils in the frontend

Moonlight.Frontend/UI/Admin/Modals/CreateUserDialog.razor

@@ -1,11 +1,17 @@
-@using Moonlight.Shared.Http.Requests.Users
+@using Moonlight.Frontend.Helpers
+@using Moonlight.Shared.Http.Requests.Users
+@using Moonlight.Shared.Http.Responses
 @using ShadcnBlazor.Dialogs
 @using ShadcnBlazor.Extras.Forms
+@using ShadcnBlazor.Extras.Toasts
 @using ShadcnBlazor.Fields
 @using ShadcnBlazor.Inputs
 
 @inherits ShadcnBlazor.Extras.Dialogs.DialogBase
 
+@inject HttpClient HttpClient
+@inject ToastService ToastService
+
 <DialogHeader>
     <DialogTitle>
         Create new user
@@ -19,7 +25,7 @@
 
     <FieldGroup>
         <FormValidationSummary/>
-        <DataAnnotationsValidator/>
+        <DataAnnotationsValidator />
 
         <FieldSet>
             <Field>
@@ -45,7 +51,7 @@
 
 @code
 {
-    [Parameter] public Func<CreateUserDto, Task> OnSubmit { get; set; }
+    [Parameter] public Func<Task> OnCompleted { get; set; }
 
     private CreateUserDto Request;
 
@@ -56,7 +62,24 @@
 
     private async Task<bool> OnSubmitAsync(EditContext editContext, ValidationMessageStore validationMessageStore)
     {
-        await OnSubmit.Invoke(Request);
+        var response = await HttpClient.PostAsJsonAsync(
+            "/api/admin/users",
+            Request,
+            Constants.SerializerOptions
+        );
+
+        if (!response.IsSuccessStatusCode)
+        {
+            await ProblemDetailsHelper.HandleProblemDetailsAsync(response, Request, validationMessageStore);
+            return false;
+        }
+
+        await ToastService.SuccessAsync(
+            "User creation",
+            $"Successfully created user {Request.Username}"
+        );
+
+        await OnCompleted.Invoke();
         await CloseAsync();
 
         return true;