code: def _remove_creds(creds_file=None):
      
      if creds_file is None:
          creds_file = os.path.expanduser("~/.onecodex")
  
      try:
          os.remove(creds_file)
      except Exception as e:
          if e.errno == errno.ENOENT:
              return False
          elif e.errno == errno.EACCES:
              click.echo(
                  "Please check the permissions on {}".format(collapse_user(creds_file)), err=True
              )
              sys.exit(1)
          else:
              raise
  
      return True
docs: Remove ~/.onecodex file, returning True if successul or False if the file didn't exist