Guardians can make weekplans for Trustee users.

[JMyrtue]

Description

Currently, a Guardian user is able to make a weekplan for the Trustee, which should not be intended. If the Trustee tries to access its weekplan, the application crashes.

To Reproduce
Steps to reproduce the behavior:

1. Login to a Guardian user and identify a Trustee user.
2. Create a Weekplan for the Trustee.
3. Logout of the Guardian user, and login to the Trustee.
4. Try and access the newly created weekplan.

Expected behavior
The functionality should not be available for a Guardian when inspecting a Trustee.