func (c *Cacher) GetUserManga(query model.UserListQuery) (data []model.UserManga, code int, err error) {
    // Get from cache.
    key := internal.GetKey(internal.KeyUserManga, query.Username, query.Page, query.Status, query.Order, query.Tag)
    if c.cacher.Get(key, &data) == nil {
        return data, http.StatusOK, nil