Purpose (What I want to achieve): A public Calendar with input new event. I want user if they fill the form of meeting in my website, the Graph API can create event to my calendar. They don't need to login to Microsoft Account to fill.
Problem : I only see the example code of Delegated Account. Example: the app need Microsoft Account to login and it create event to their(user) calendar not mine.
I have already retrieve account id, and calendar id.
I have created app registration, client secret and add permission (Calendars.Read , Calendars.ReadWrite) of application permissions.