Client ID for an extension for OAuth2 - It is required to allow access to google account data

Hi, I am working on an extension which fetches my google calendar events and shows them nicely as graphs and summarizes the events. I need a CLIENT_ID in for getting an access token from google (OAuth2). I got one from my google cloud console but I don't think I should push that to the add-ons site. I am quite new to this javascript/browser world and don't know where to go from here. It would be great if people can just download my add-on and just use it without providing a client ID and zipping it themselves. I asked this question on stack overflow and they marked it as off-topic :_). So far I couldn't find any information related to this on the web.