improve creator in admin

tournaments/admin.py

@@ -44,6 +44,7 @@ class CustomUserAdmin(UserAdmin):
 class EventAdmin(admin.ModelAdmin):
     list_display = ['creation_date', 'name', 'club', 'creator', 'tenup_id']
     list_filter = ['creator', 'tenup_id']
+    raw_id_fields = ['creator']
     ordering = ['-creation_date']
 
 class TournamentAdmin(admin.ModelAdmin):
@@ -113,6 +114,7 @@ class ClubAdmin(admin.ModelAdmin):
     list_display = ['name', 'acronym', 'city', 'creator', 'events_count', 'broadcast_code']
     search_fields = ('name', 'acronym', 'city')
     ordering = ['creator']
+    raw_id_fields = ['creator']
 
 class PurchaseAdmin(admin.ModelAdmin):
     list_display = ['id', 'user', 'product_id', 'quantity', 'purchase_date', 'revocation_date', 'expiration_date']