Update last_update date when changing the user on the admin

tournaments/admin.py

@@ -1,13 +1,10 @@
 from django.contrib import admin
 
-from tournaments.models.device_token import DeviceToken
-from tournaments.models.draw_log import DrawLog
-
-from .models import Club, TeamScore, Tournament, CustomUser, Event, Round, GroupStage, Match, TeamRegistration, PlayerRegistration, Purchase, Court, DateInterval, FailedApiCall, Log
 from django.contrib.auth.admin import UserAdmin
+from django.utils import timezone
 
+from .models import Club, TeamScore, Tournament, CustomUser, Event, Round, GroupStage, Match, TeamRegistration, PlayerRegistration, Purchase, Court, DateInterval, FailedApiCall, Log, DeviceToken, DrawLog
 from .forms import CustomUserCreationForm, CustomUserChangeForm
-
 from .filters import TeamScoreTournamentListFilter, MatchTournamentListFilter, SimpleTournamentListFilter, MatchTypeListFilter, SimpleIndexListFilter
 
 from sync.admin import AutoUpdateAdmin
@@ -37,6 +34,10 @@ class CustomUserAdmin(UserAdmin):
         ),
     ]
 
+    def save_model(self, request, obj, form, change):
+        obj.last_update = timezone.now()
+        super().save_model(request, obj, form, change)
+
 class EventAdmin(admin.ModelAdmin):
     list_display = ['creation_date', 'name', 'club', 'creator', 'tenup_id']
     list_filter = ['creator', 'tenup_id']