code: def to_cnf(self) -> str:
      cnf = f"""[client]
  host={self.host}
  user={self.user}
  port={self.port}
  password="{self.password}"
  ssl-ca={self.ssl_ca}
  ssl-mode={self.ssl_mode}
  """
      if self.db is not None:
          cnf += f"database={self.db}\n"
      if self.using_mtls():
          cnf += f"ssl-cert={self.ssl_cert}\n"
          cnf += f"ssl-key={self.ssl_key}\n"
      return cnf
  
file_path: hail/hail/python/hailtop/auth/sql_config.py
imports: from typing import Dict, NamedTuple, Optional, Any
  import json
  import os
label_desc: Use image node_id 3 for calling the SQLConfig obj's underlying member method code with example usage: obj.to_cnf() and returns: cnf