docs: def ts_to_str(jwt_dict):
      """Convert timestamps in JWT to human readable dates.
  
      Args:
        jwt_dict: dict
          JWT with some keys containing timestamps.
  
      Returns:
        dict: Copy of input dict where timestamps have been replaced with human readable
        dates.
  
      """
      d = ts_to_dt(jwt_dict)
      for k, v in list(d.items()):
          if isinstance(v, datetime.datetime):
              d[k] = v.isoformat().replace('T', ' ')
      return d