async getTotalMembersInRange({days, totalMembers, siteTimezone}) {
        if (days === 'all-time') {
            return totalMembers;
        }

        const startOfRange = moment.tz(siteTimezone).subtract(days - 1, 'days').startOf('day').utc().format(dateFormat);
        const result = await this._db.knex.raw('SELECT COUNT(id) AS total FROM members WHERE created_at >= ?', [startOfRange]);
        return this._isSQLite ? result[0].total : result[0][0].total;
    }
@param {Number | String} days  - number of days to fetch of 'all-time' to get for all existing records
@param {Number} totalMembers - number of registered members
@param {String} siteTimezone - site's current timezone