fix(internal_user_endpoints.py): fix check

Author: krrishdholakia

litellm/proxy/management_endpoints/internal_user_endpoints.py

@@ -199,14 +199,17 @@ async def _add_user_to_team(
                     str(e)
                 )
             )
-    except ProxyException as e:
+    except Exception as e:
         if "already exists" in str(e) or "doesn't exist" in str(e):
             verbose_proxy_logger.debug(
                 "litellm.proxy.management_endpoints.internal_user_endpoints.new_user(): User already exists in team - {}".format(
                     str(e)
                 )
             )
-        elif ProxyErrorTypes.team_member_already_in_team in e.type:
+        elif (
+            isinstance(e, ProxyException)
+            and ProxyErrorTypes.team_member_already_in_team in e.type
+        ):
             verbose_proxy_logger.debug(
                 "litellm.proxy.management_endpoints.internal_user_endpoints.new_user(): User already exists in team - {}".format(
                     str(e)