[Cohere] Add client name to Cohere calls (#10384)

Add client name to cohere calls

llama_index/embeddings/cohereai.py

@@ -111,7 +111,7 @@ class CohereEmbedding(BaseEmbedding):
             raise ValueError(f"truncate must be one of {VALID_TRUNCATE_OPTIONS}")
 
         super().__init__(
-            cohere_client=cohere.Client(cohere_api_key),
+            cohere_client=cohere.Client(cohere_api_key, client_name="llama_index"),
             cohere_api_key=cohere_api_key,
             model_name=model_name,
             truncate=truncate,

llama_index/finetuning/rerankers/cohere_reranker.py

@@ -38,7 +38,7 @@ class CohereRerankerFinetuneEngine(BaseCohereRerankerFinetuningEngine):
                 "Must pass in cohere api key or "
                 "specify via COHERE_API_KEY environment variable "
             )
-        self._model = cohere.Client(self.api_key)
+        self._model = cohere.Client(self.api_key, client_name="llama_index")
         self._train_file_name = train_file_name
         self._val_file_name = val_file_name
         self._model_name = model_name

llama_index/llms/cohere.py

@@ -69,8 +69,8 @@ class Cohere(LLM):
         additional_kwargs = additional_kwargs or {}
         callback_manager = callback_manager or CallbackManager([])
 
-        self._client = cohere.Client(api_key)
-        self._aclient = cohere.AsyncClient(api_key)
+        self._client = cohere.Client(api_key, client_name="llama_index")
+        self._aclient = cohere.AsyncClient(api_key, client_name="llama_index")
 
         super().__init__(
             temperature=temperature,