diff --git a/Controllers/QuoteController.cs b/Controllers/QuoteController.cs
index 6a13c86..491f6e5 100644
--- a/Controllers/QuoteController.cs
+++ b/Controllers/QuoteController.cs
@@ -141,13 +141,13 @@ public class QuotesController : ControllerBase
             Author = request.Author,
             CreatedAt = DateTime.UtcNow,
             LastUpdatedAt = DateTime.UtcNow,
-            ImageId = image?.Id ?? 0,
+            ImageId = image?.Id ?? null,
             UserId = userId,
             QuoteCategories = new List<QuoteCategory>()
         };
 
         // Attach categories
-        foreach (var categoryId in request.CategoryIds)
+        foreach (var categoryId in request.CategoryIds ?? [])
         {
             var categoryExists = await _db.Categories.AnyAsync(c => c.Id == categoryId);
             if (!categoryExists)
diff --git a/Controllers/Seed.cs b/Controllers/Seed.cs
index d230c29..76e6250 100644
--- a/Controllers/Seed.cs
+++ b/Controllers/Seed.cs
@@ -29,7 +29,8 @@ namespace QuotifyBE.Controllers
                     Name="admin",
                     Email = "admin@mail.com",
                     // hashed twice, once by frontend, and second time by backend
-                    PasswordHash = guhf.HashWithSHA512(guhf.HashWithSHA512("admin"))
+                    PasswordHash = guhf.HashWithSHA512(guhf.HashWithSHA512("admin")),
+                    Role = 0 // role 0 - greatest power, admin, role 0 > role 1
                 };
                 _db.Users.Add(Admin);
                 await _db.SaveChangesAsync();
diff --git a/DTOs/CreateQuoteDTO.cs b/DTOs/CreateQuoteDTO.cs
index 7e95485..f50a530 100644
--- a/DTOs/CreateQuoteDTO.cs
+++ b/DTOs/CreateQuoteDTO.cs
@@ -2,6 +2,6 @@ public record class CreateQuoteDTO
 {
     public string Text { get; set; }
     public string Author { get; set; }
-    public List<int> CategoryIds { get; set; }
+    public List<int>? CategoryIds { get; set; }
     public string? ImageUrl { get; set; }
 };
diff --git a/DTOs/UserInfoDTO.cs b/DTOs/UserInfoDTO.cs
index 548168d..f30dbda 100644
--- a/DTOs/UserInfoDTO.cs
+++ b/DTOs/UserInfoDTO.cs
@@ -5,6 +5,6 @@ public record class UserInfoDTO
     public int Id { get; set; }
     required public string Name { get; set; }
     required public string Email { get; set; }
-    public int Role {  get; set; }
+    public int Role { get; set; }
 
 };