code: function ( expiry ) {
  
      if ( expiry ) {
  
        switch ( expiry.constructor ) {
  
          case Number:
            return ( expiry === Infinity ) ? false : _.nowSecs () + expiry;
  
          case String:
            return getExpiry ( new Date ( expiry ) );
  
          case Date:
            let timestamp = expiry.getTime ();
            return _.isNaN ( timestamp ) ? false : Math.floor ( timestamp / 1000 );
  
        }
  
      }
  
      return false;
  
    }
docs: /* UTILITIES