feat(pgbouncer): let the app user read the PgBouncer console (stats_users)

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

litellm/proxy/db/pgbouncer.py

@@ -214,6 +214,7 @@ def plan_pgbouncer(
             f"unix_socket_dir = {runtime_dir}",
             f"auth_file = {runtime_dir / PGBOUNCER_USERLIST_NAME}",
             "auth_type = scram-sha-256",
+            f"stats_users = {username}",
             "pool_mode = transaction",
             f"max_client_conn = {settings.max_client_conn}",
             f"default_pool_size = {settings.max_db_connections}",

tests/test_litellm/proxy/db/test_pgbouncer.py

@@ -78,6 +78,9 @@ class TestPlanPgBouncer:
         assert pgb["auth_file"] == "/run/pgb/userlist.txt"
         assert pgb["unix_socket_dir"] == "/run/pgb"
 
+    def test_the_app_user_can_read_the_pgbouncer_console(self):
+        assert _ini(_plan())["pgbouncer"]["stats_users"] == "app"
+
     def test_pooled_url_points_prisma_at_loopback_without_prepared_statements(self):
         pooled: Final = urllib.parse.urlsplit(_plan().pooled_url)
         assert (pooled.hostname, pooled.port, pooled.path) == ("127.0.0.1", 6543, "/litellm")