Google Calendar API: When accessing a calendar of users in a domain, AccessRole is always FreeBusyReader

Question

I am trying to read a user calendar with a service account. The user’s calendar is shared with the service account using an AccessRole “reader”. However, when I open the calendar of any user, it always opens as "FreeBusyReader":

First, I add the user to the calendar list (I got the impression that he works better when he is on the list, I don’t know if this is really necessary):

Dim Calendar As CalendarListEntry Calendar = service.CalendarList().Insert(" [e-mail] ").Execute() 

Then I check the access role with:

 Calendar.AccessRole 

And it always returns "FreeBusyReader".

This also matches the results in the query:

 Dim requeust As ListRequest = service.Events.List("<email address>") requeust.MaxResults = 99 requeust.TimeMin = DateTime.Now.ToString(dateFormat) requeust.TimeMax = DateTime.Now.AddDays(fetchtimespan).ToString(dateFormat) requeust.ShowDeleted = True requeust.SingleEvents = True 

returns a list of records, but without a summary, and the list of events also has the same AccessRole.

What I did with the user was to share the calendar with the email address of the service users ( [e-mail] ), I also checked this through the API.

Any ideas?