public async Task <string> Return_purchase_payables_appsettings_connectionstrings_async()
        {
            var test_url = new Purchase_and_payable();
            var client   = new HttpClient();
            var response = await client.GetStringAsync($"{test_url.Backend}test_response/purchase_payables/get/connectionstring");

            return(response);
        }
        public async Task <bool> Access_purchase_payables_tables()
        {
            var test_url = new Purchase_and_payable();
            var client   = new HttpClient();
            var conn_str = await client.GetStringAsync($"{test_url.Backend}test_response/purchase_payables/get/connectionstring");

            var query = "select * from cor_paymentterms";

            return(Access_database_and_return_boolean(conn_str, query));
        }