code: def get_milvus_client(
      milvus_uri: str,
      milvus_user: str,
      milvus_password: str,
      milvus_db_name: str,
      milvus_token: str,
  ):
      global _milvus_client_instance
      if _milvus_client_instance is None:
          try_to_import_milvus_client()
          import pymilvus
  
          _milvus_client_instance = pymilvus.MilvusClient(
              uri=milvus_uri,
              user=milvus_user,
              password=milvus_password,
              db_name=milvus_db_name,
              token=milvus_token,
          )
  
      return _milvus_client_instance
  
file_path: evadb/evadb/third_party/vector_stores/milvus.py
imports: import os
  from typing import List
  from evadb.third_party.vector_stores.types import FeaturePayload, VectorIndexQuery, VectorIndexQueryResult, VectorStore
  from evadb.utils.generic_utils import try_to_import_milvus_client
label_desc: Use image node_id 1 for calling a global function with example usage: get_milvus_client(milvus_uri, milvus_user, milvus_password, milvus_db_name, milvus_token) and returns: _milvus_client_instance