(docs) add doc string for check_valid_api_key

litellm/utils.py

@@ -2508,10 +2508,17 @@ def valid_model(model):
     except:
         raise InvalidRequestError(message="", model=model, llm_provider="")
 
-# check valid api key 
 def check_valid_key(model: str, api_key: str):
-    # returns True if key is valid for the model
-    # returns False if key is invalid for the model
+    """
+    Checks if a given API key is valid for a specific model by making a litellm.completion call with max_tokens=10
+
+    Args:
+        model (str): The name of the model to check the API key against.
+        api_key (str): The API key to be checked.
+
+    Returns:
+        bool: True if the API key is valid for the model, False otherwise.
+    """
     messages = [{"role": "user", "content": "Hey, how's it going?"}]
     try:
         litellm.completion(model=model, messages=messages, api_key=api_key, max_tokens=10)