fix(proxy_server.py): fix /v1/models bug where it would return empty list

handle 'all-team-models' being set for a given key

litellm/proxy/proxy_server.py

@@ -227,6 +227,10 @@ class UserAPIKeyCacheTTLEnum(enum.Enum):
     global_proxy_spend = 60
 
 
+class SpecialModelNames(enum.Enum):
+    all_team_models = "all-team-models"
+
+
 @app.exception_handler(ProxyException)
 async def openai_exception_handler(request: Request, exc: ProxyException):
     # NOTE: DO NOT MODIFY THIS, its crucial to map to Openai exceptions
@@ -3436,7 +3440,9 @@ def model_list(
     all_models = []
     if len(user_api_key_dict.models) > 0:
         all_models = user_api_key_dict.models
-    else:
+        if SpecialModelNames.all_team_models.value in all_models:
+            all_models = user_api_key_dict.team_models
+    if len(all_models) == 0:  # has all proxy models
         ## if no specific model access
         if general_settings.get("infer_model_from_keys", False):
             all_models = litellm.utils.get_valid_models()