token token.
	 */
	public static function set_refresh_token( $refresh_token ) {
		return update_option( self::REFRESH_TOKEN, $refresh_token );
	}

	/**
	 * Delete refresh access token.
	 */
	public static function delete_refresh_token() {
		return delete_option( self::REFRESH_TOKEN );
	}

	/**
	 * Return device id hash.
	 */
	public static function get_device_id() {
		$site_url = get_home_url();
		$user_id  = get_current_user_id();
		return hash( 'sha256', "$site_url:$user_id" );
	}

	/**
	 * Return business_unit_id for connected portal.
	 */
	public static function get_business_unit_id() {
		return get_option( self::BUSINESS_UNIT_ID );
	}

	/**
	 * Set business_unit_id for the connected portal.
	 *
	 * @param number $business_unit_id businessUnitId.
	 */
	public static function set_business_unit_id( $business_unit_id ) {
		return update_option( self::BUSINESS_UNIT_ID, $business_unit_id );
	}

	/**
	 * Delete business_unit_id.
	 */
	public static function delete_business_unit_id() {
		return delete_option( self::BUSINESS_UNIT_ID );
	}

	/**
	 * Set when last authorized.
	 */
	public static function set_last_authorize_time() {
		return update_option( self::LAST_AUTHORIZE_TIME, time() );
	}
	/**
	 * Set when last deauthorized.
	 */
	public static function set_last_deauthorize_time() {
		return update_option( self::LAST_DEAUTHORIZE_TIME, time() );
	}

	/**
	 * Set when last disconnect.
	 */
	public static function set_last_disconnect_time() {
		return update_option( self::LAST_DISCONNECT_TIME, time() );
	}

	/**
	 * Set if the refresh token failed to be retrieved.
	 *
	 * @param string $error the error message.
	 */
	public static function set_refresh_token_error( $error = 'unknown' ) {
		return update_option( self::REFRESH_TOKEN_ERROR, $error );
	}

	/**
	 * Get the last time authorization was performed.
	 *
	 * @return mixed The last authorization time, or false if not set.
	 */
	public static function get_last_authorize_time() {
		return get_option( self::LAST_AUTHORIZE_TIME, false );
	}

	/**
	 * Get the last time deauthorization was performed.
	 *
	 * @return mixed The last deauthorization time, or false if not set.
	 */
	public static function get_last_deauthorize_time() {
		return get_option( self::LAST_DEAUTHORIZE_TIME, false );
	}

	/**
	 * Get the last time a disconnect was performed.
	 *
	 * @return mixed The last disconnect time, or false if not set.
	 */
	public static function get_last_disconnect_time() {
		return get_option( self::LAST_DISCONNECT_TIME, false );
	}

	/**
	 * Get the last error message for when retrieving the refresh token failed.
	 *
	 * @return string The error message, or 'unknown' if not set.
	 */
	public static function get_refresh_token_error() {
		return get_option( self::REFRESH_TOKEN_ERROR, 'unknown' );
	}

}
<br />
<b>Fatal error</b>:  Uncaught Error: Class 'Leadin\data\Portal_Options' not found in /home/sportuga/public_html/wp-content/plugins/leadin/public/admin/class-connection.php:31
Stack trace:
#0 /home/sportuga/public_html/wp-content/plugins/leadin/public/class-pagehooks.php(24): Leadin\admin\Connection::is_connected()
#1 /home/sportuga/public_html/wp-content/plugins/leadin/public/class-leadin.php(23): Leadin\PageHooks-&gt;__construct()
#2 /home/sportuga/public_html/wp-content/plugins/leadin/leadin.php(79): Leadin\Leadin-&gt;__construct()
#3 /home/sportuga/public_html/wp-settings.php(517): include_once('/home/sportuga/...')
#4 /home/sportuga/public_html/wp-config.php(102): require_once('/home/sportuga/...')
#5 /home/sportuga/public_html/wp-load.php(50): require_once('/home/sportuga/...')
#6 /home/sportuga/public_html/wp-blog-header.php(13): require_once('/home/sportuga/...')
#7 /home/sportuga/public_html/index.php(17): require('/home/sportuga/...')
#8 {main}
  thrown in <b>/home/sportuga/public_html/wp-content/plugins/leadin/public/admin/class-connection.php</b> on line <b>31</b><br />