fix(fireworks): require api_key in FireworksEmbeddings (#37193)

libs/partners/fireworks/langchain_fireworks/chat_models.py

@@ -708,11 +708,7 @@ class ChatFireworks(BaseChatModel):
             raise ValueError(msg)
 
         client_params = {
-            "api_key": (
-                self.fireworks_api_key.get_secret_value()
-                if self.fireworks_api_key
-                else None
-            ),
+            "api_key": self.fireworks_api_key.get_secret_value(),
             "base_url": self.fireworks_api_base,
             "timeout": self.request_timeout,
         }

libs/partners/fireworks/langchain_fireworks/embeddings.py

@@ -71,7 +71,11 @@ class FireworksEmbeddings(BaseModel, Embeddings):
         alias="api_key",
         default_factory=secret_from_env(
             "FIREWORKS_API_KEY",
-            default="",
+            error_message=(
+                "You must specify an api key. "
+                "You can pass it an argument as `api_key=...` or "
+                "set the environment variable `FIREWORKS_API_KEY`."
+            ),
         ),
     )
     """Fireworks API key.