async getMemberCountHistory(options = {}) {
        // Map dateFrom to startDate for backwards compatibility
        const mappedOptions = {
            ...options,
            startDate: options.dateFrom
        };
        delete mappedOptions.dateFrom;

        return this.members.getCountHistory(mappedOptions);
    }
@param {Object} [options]
@param {string} [options.dateFrom] - Start date in YYYY-MM-DD format
@param {string} [options.endDate] - End date in YYYY-MM-DD format