Update Access Group

Update an access group's model names.

This will:

1. Remove the access group from all current deployments
2. Add the access group to all deployments for the new model_names list

Example:

curl -X PUT 'http://localhost:4000/access_group/production-models/update' \
  -H "Authorization: Bearer $LITELLM_MASTER_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
    "model_names": ["gpt-4", "claude-3-sonnet"]
  }'

Parameters:

• access_group: str - The access group name (URL path parameter)
• model_names: List[str] - New list of model groups to include

Returns:

• NewModelGroupResponse with the updated access group details

Raises:

• HTTPException 400: If any model names don't exist
• HTTPException 404: If access group not found