[Php-calendar-discussion] How to prevent adding new calender users from every user?

[Detox|Matze <ma...@de...>]

Hi there,

is it possible to prevent calender-users to add new users?
I mean:
At the moment, every registered user can admin my calender and i.e. add 
new users!
How can I stop this?

Thanks for any advice!

Greetings,

Matthias