via email, includes information about tenant and tokens
getAllUsers (pick email, copy it to completeUserList, put the obj. into option val, dismantle selected option val, add email to newUser, when preparing http method get the email to notify list, after successful http the notification should be sent to members of list)
restriction: member user can see tenants, but not modify them
user id in users.services.fiware.id can be used to assure, if the signed-in user is also owner of the tenant. Owner sees buttons [Edit] and [Remove], member does not.
Workshop with Ilari 2019-03-19