unbookmark = async options => {
  let { post_id, when, user, dispatch, done } = options
  let session = uData('session')

  let {
    data: { success, mssg },
  } = await post('/api/unbookmark-post', { post: post_id, user: session })

  if (success) {
    if (when == 'bookmarks' && Me(user)) {
      dispatch(PostActions.unbookmark(post_id))
      Notify({ value: 'Post unbookmarked!!' })
    }
    done()
  } else {
    Notify({ value: mssg })
  }
}
Unbookmark post
@param {Object} options
@param {Number} options.post_id
@param {String} options.when
@param {Number} options.user
@param {Function} options.dispatch
@param {Function} options.done