A while back my client gave me permission to her Google Calendar so I can connect it to a application. I did so by going through the steps and downloading a .json file. I will admit that this was my first and only connection to the Google API.
Recently she has removed the permission, and the API call no longer work. She would like me to go in to her office and connect it from there. So I don't spent a lot of time, could anyone please tell me the steps for setting up the Google API under her account, then downloading the .json file?