public function mp_token( $value, $pieces, $recipe_id, $trigger_data, $user_id, $replace_args ) {
		if ( $pieces ) {
			$matches = [ 'MPPRODUCT', 'MPPRODUCT_ID', 'MPPRODUCT_URL', 'first_name', 'last_name' ];
			if ( array_intersect( $matches, $pieces ) ) {
				//
				//$user_id = wp_get_current_user()->ID;
				// all memberpress values will be saved in usermeta.
				$value = get_user_meta( $user_id, 'MPPRODUCT', true );
				if ( is_array( $value ) ) {
					$value = implode( ', ', $value );
				} else {
					switch ( $pieces[2] ) {
						case 'MPPRODUCT_ID':
							$value = absint( $value );
							break;
						case 'MPPRODUCT_URL':
							$value = get_the_permalink( $value );
							break;
						case 'first_name':
							$value = get_user_by( 'ID', $user_id )->first_name;
							break;
						case 'last_name':
							$value = get_user_by( 'ID', $user_id )->last_name;
							break;
						default:
							$value = get_the_title( $value );
							break;
					}
				}
			}
		}

		return $value;
	}