async createBookmark (uid, name) {
    let result = await db('bookmarks').insert({
      uid,
      name,
      createTime: (new Date()).getTime(),
      updateTime: (new Date()).getTime()
    }).select('id')

    result = result[0]

    return result
  }
Create new bookmark

@param {Int} uid user id
@param {String} name bookmark name

@returns {Int} bookmark id