added beneficiary routes

src/services/beneficiary.service.js

@@ -0,0 +1,16 @@
+const { logger } = require('../util/logger');
+
+async function validateWithinBank(accountNo) {
+  const url = `http://localhost:8687/kccb/cbs/acctInfo/details?stacctno=${accountNo}`;
+  try {
+    const response = await fetch(url);
+    const data = await response.json();
+    const customerName = data.customername;
+    return customerName;
+  } catch (error) {
+    logger.error(error, 'error while fetching customer details');
+    throw new Error('unable to fetch customer name');
+  }
+}
+
+module.exports = { validateWithinBank };