I am new to Google API usage, so please excuse the seemingly basic question. I am writing a mobile app for members of a Club. The app needs to access a Google calendar and photo storage both maintained by the Club admin. I am having difficulty getting my head around the type of app I should be creating (Web Client, IOS, Android or all). When the OAuth consent screen opens, I am not sure which credentials the user should be entering (theirs or the Club admin).
What is required to allow the user to gain access to the shared calendar and photos?