This is probably a very noob question, but I've wasted the last day over it, so here goes:
Using Facebook's Graph API, I want my app's server to be able to retrieve all conversations from my page. As per the docs, I should be able to do so by calling
GET /<MY_PAGE_ID>/conversations?access_token=<MY_ACCESS_TOKEN>
However, I get an error
(#279) Requires read_page_mailboxes permission to manage the object
Which makes sense, since I never granted the read_page_mailbox permission. However, I can't find a way (either through the API or the developer management interface) to grant it. How on Earth can I do it?
Thanks!