def any_session!
      unless @session_token.present?
        _active_session = active_sessions(restricted: false, order: :updated_at.desc).first
        self.session_token = _active_session.session_token if _active_session.present?
      end
      @session_token
    end
def any_session!
      unless @session_token.present?
        _active_session = active_sessions(restricted: false, order: :updated_at.desc).first
        self.session_token = _active_session.session_token if _active_session.present?
      end
      @session_token
    end
If the current session token for this instance is nil, this method finds
 the most recent active Parse::Session token for this user and applies it to the instance.
 The user instance will now be authenticated and logged in with the selected session token.
 Useful if you need to call save or destroy methods on behalf of a logged in user.
 @return [String] The session token or nil if no session was found for this user.