I am trying to integrate file uploading option for guest users to my google drive using php. But while run the code, it is asking for my google user name and password. How to avoid that and without login via google account, user can upload file to my google drive. I am following the same steps as mentioned in https://developers.google.com/drive/web/quickstart/quickstart-js I have checked the post http://stackoverflow.com/questions/13269201/let-anonymous-users-upload-files-to-my-google-drive-using-the-google-drive-sdk but unfortunately the page is not opening right now.