Is the only way to connect a Google Event Calendar to login to a specific google account? I am building a website for a client who does not want to provide me with their Google login information. They have the shareable link, but I don’t know if I can use that to connect it?
I believe login into their account is the only way.
Yes, the Events app has to request permission from Google so you do need to be able to login to the account you want to link to the events. You could always setup a separate Google account just for events and link it to his google calendar.
A workaround might be to just create a gmail account for the calendar and then they are not sharing private information.