Description 
 This method contains a ‘session_token_manager’ filter, allowing a plugin to swap out the session manager for a subclass of WP_Session_Tokens.
    Parameters 
  - $user_id
-   (int) (Required) User whose session to manage.  
Return 
 (WP_Session_Tokens) The session object, which is by default an instance of the WP_User_Meta_Session_Tokens class.
    Source 
  File: wp-includes/class-wp-session-tokens.php 
 final public static function get_instance( $user_id ) {
		/**
		 * Filters the class name for the session token manager.
		 *
		 * @since 4.0.0
		 *
		 * @param string $session Name of class to use as the manager.
		 *                        Default 'WP_User_Meta_Session_Tokens'.
		 */
		$manager = apply_filters( 'session_token_manager', 'WP_User_Meta_Session_Tokens' );
		return new $manager( $user_id );
	}       Changelog 
     | Version | Description | 
    | 4.0.0 | Introduced. |