docs: def get_token(opts, tok):
      '''
      Fetch the token data from the store.
  
      :param opts: Salt master config options
      :param tok: Token value to get
      :returns: Token data if successful. Empty dict if failed.
      '''
      redis_client = _redis_client(opts)
      if not redis_client:
          return {}
      serial = salt.payload.Serial(opts)
      try:
          tdata = serial.loads(redis_client.get(tok))
          return tdata
      except Exception as err:
          log.warning(
              'Authentication failure: cannot get token %s from redis: %s',
              tok, err
          )
          return {}