change many to many to autocomplete in the admin

tournaments/admin.py

@@ -32,7 +32,7 @@ class CustomUserAdmin(UserAdmin):
     list_display = ['email', 'first_name', 'last_name', 'username', 'date_joined', 'latest_event_club_name', 'is_active', 'event_count', 'origin', 'registration_payment_mode', 'licence_id']
     list_filter = ['is_active', 'origin', UserWithEventsFilter, UserWithPurchasesFilter, UserWithProspectFilter]
     ordering = ['-date_joined']
-    raw_id_fields = ['supervisors', 'organizers']
+    autocomplete_fields = ['supervisors', 'organizers']
     fieldsets = [
         (None, {'fields': ['id', 'username', 'email', 'password', 'first_name', 'last_name', 'is_active', 'date_joined']}),
         ('Permissions', {'fields': ['is_staff', 'is_superuser', 'groups', 'user_permissions']}),