Add cash transaction api endpoint

controllers/cashTransactionController.js

@@ -0,0 +1,41 @@
+var cashTransactionModel = require('../models/cashTransactionModel.js');
+
+module.exports = {
+
+  list: function (req, res) {
+    cashTransactionModel.find()
+      .then(transactions => {
+        var data = {
+          messages: transactions
+        };
+        return res.render('cash', data);
+      })
+      .catch(err => {
+        return res.status(500).json({
+          message: 'Error when getting transactions.',
+          error: err
+        });
+      });
+  },
+
+  create: async function (req, res) {
+   var transaction = new cashTransactionModel({
+    raw: req.body.messageBody
+   });
+
+   const trans = await transaction.save()
+   if(trans){
+    return res.status(201).json({ message: 'Welcome to the API POST' });
+   }
+   else{
+    return res.status(400).json({message: "something went wrong"});
+   }
+  },
+
+  delete: function (req, res) {
+    cashTransactionModel.deleteMany({})
+    .then(data =>{
+      res.status(201).json({message:"OK"});
+    });
+  },
+};