fix(admin_login): redirect authenticated users away to prevent loop

lelcsc/core/views.py

@@ -14,6 +14,9 @@ def unauthorized(request):
 
 
 def admin_login(request):
+    if request.user.is_authenticated:
+        return redirect("unauthorized")
+
     query = ""
     if next := request.GET.get("next"):
         q = QueryDict(mutable=True)