code: public boolean destroyGuacamoleSession(String authToken) {
  
          // Remove corresponding GuacamoleSession if the token is valid
          GuacamoleSession session = tokenSessionMap.remove(authToken);
          if (session == null)
              return false;
  
          // Invalidate the removed session
          session.invalidate();
          return true;
  
      }
docs: Invalidates a specific authentication token and its corresponding
  Guacamole session, effectively logging out the associated user. If the
  authentication token is not valid, this function has no effect.
  
  @param authToken
  The token being invalidated.
  
  @return
  true if the given authentication token was valid and the
  corresponding Guacamole session was destroyed, false if the given
  authentication token was not valid and no action was taken.