protected function _get_sns_accounts( $user_id ) {
		$sns_accounts     = $this->_sns_accounts();
		$sns_account_keys = array_keys( $sns_accounts );

		$sns_accounts = [];

		foreach ( $sns_account_keys as $sns_account_key ) {
			$sns_account = get_the_author_meta( $sns_account_key, $user_id );
			if ( ! $sns_account ) {
				continue;
			}
			$sns_accounts[ $sns_account_key ] = $sns_account;
		}

		return $sns_accounts;
	}