code: def start(self):
      self._verify_aws_creds()
      self._verify_terraform()
      util.ensure_dir(self.working_dir)
      self._refresh_config()
      self._ensure_terraform_init()
      self._terraform_apply()
  
imports: import json
  import logging
  import os
  import re
  import subprocess
  import sys
  from guild import remote
  from guild import remote_util
  from guild import util
  from guild import var
  from .None import ssh
  from .None import ssh_util
label_desc: Use image node_id 4 for calling the EC2Remote obj's underlying member method code with example usage: obj.start() without return types