Fixed data not being properly sent to the calendar

Simcha van Collem
2019-10-03T17:05:41+02:00

/label ~bug

Closes #928

#### Previous behaviour
Steps to reproduce:

1. Open the calendar
2. Notice the birthdays button is always availabe and the unpublished events are never shown.

#### New behaviour
Steps to validate that it works:

1. Open the calendar
2. Notice the birthdays button is not availabe in non-authenticated mode and the unpublished events are shown if you have the permission.