code: def test_modify_missing_remote(tmp_dir, dvc):
      assert (
          main(["remote", "modify", "myremote", "user", "xxx"]) == 251
      )
  
imports: import errno
  import itertools
  import os
  import stat
  import configobj
  import pytest
  from dvc.cli import main
  from dvc.config import Config
  from dvc.exceptions import DownloadError, UploadError
  from dvc.utils.fs import remove
label_desc: Use image node_id 13 for calling a global function with example usage: test_modify_missing_remote(tmp_dir, dvc) without return types