community[patch]: standardize init args (#20210)

Related to https://github.com/langchain-ai/langchain/issues/20085

@baskaryan

libs/community/langchain_community/chat_models/tongyi.py

@@ -160,7 +160,7 @@ class ChatTongyi(BaseChatModel):
     top_p: float = 0.8
     """Total probability mass of tokens to consider at each step."""
 
-    dashscope_api_key: Optional[SecretStr] = None
+    dashscope_api_key: Optional[SecretStr] = Field(None, alias="api_key")
     """Dashscope api key provide by Alibaba Cloud."""
 
     streaming: bool = False
@@ -169,6 +169,11 @@ class ChatTongyi(BaseChatModel):
     max_retries: int = 10
     """Maximum number of retries to make when generating."""
 
+    class Config:
+        """Configuration for this pydantic object."""
+
+        allow_population_by_field_name = True
+
     @property
     def _llm_type(self) -> str:
         """Return type of llm."""