/// <summary>
        /// All payments on the specified account of the user
        /// </summary>
        /// <param name="accountId">ID of the account for which to retrieve the payments</param>
        /// <returns>List of payments</returns>
        public async Task <List <FigoPayment> > GetPayments(string accountId)
        {
            FigoPayment.PaymentsResponse response = await this.DoRequest <FigoPayment.PaymentsResponse>("/rest/accounts/" + accountId + "/payments");

            return(response == null ? null : response.Payments);
        }
        /// <summary>
        /// All payments on all accounts of the user
        /// </summary>
        /// <returns>List of payments</returns>
        public async Task <List <FigoPayment> > GetPayments()
        {
            FigoPayment.PaymentsResponse response = await this.DoRequest <FigoPayment.PaymentsResponse>("/rest/payments");

            return(response == null ? null : response.Payments);
        }