How do I add permission to a FAcebook App

I'm developing an Laravel API to manage Facebook Graph API and I need to post events on a page. I can list all the events but to create an event, I receive the following message:

"Unsupported post request. Object with ID '00000000000' does not exist, cannot be loaded due to missing permissions, or does not support this operation." "code": 100, "error_subcode": 33.

Searching, I saw that I need the pages_manage_events but I can't see the permission in the permissions list. How do I need to proceed to have this permissions in my facebook app? Remembering that my app is in delevoping mode and is Business type