code: public User getcurrentUser(String consumerKey, String consumerSecret,
  			String accessToken, String accessTokenSecret)
  			throws ConnectionException {
  		httpClient = new PlatformHttpClient(consumerKey, consumerSecret,
  				accessToken, accessTokenSecret);
  		User user = null;;
  		try {
  			user = this.httpClient.getCurrentUser();
  		} catch (Exception e) {
  			e.printStackTrace();
  		}
  		return user;
  	}
docs: getCurrentUser the user from quickbooks
  
  @throws ConnectionException