Reference - libs/community/langchain_community/chat_models/snowflake.py

Currently this chat model does not work without password or a PAT Token (Even though the password is given as an optional input). Snowflake is sunsetting all password only based authenication and if we want to deploy an application, we need to use a Service Account. Service account needs to authenicate based on key pairing or OAuth which is not supported by the model. Please add support for one of them so that we can use langchain to orchestrate the cortex functions.