Fetch one post by id from the caller’s calendar.
listSocialPosts instead.
Bearer authentication header of the form Bearer <token>, where <token> is your auth token.
Post UUID. Must belong to the caller's calendar.
^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$Post found.