String url = flow.newAuthorizationUrl().setRedirectUri(REDIRECT_URI).build();
System.out.println("Please open the following URL in your browser then type the authorization code:");
System.out.println(" " + url);
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String code = br.readLine();
GoogleTokenResponse response = flow.newTokenRequest(code).setRedirectUri(REDIRECT_URI).execute();
GoogleCredential credential = new GoogleCredential().setFromTokenResponse(response);
//Create a new authoized API client
Drive service = new Drive.Builder(httpTransport, jsonFactory, credential).build();
//Insert a file
File body = new File();