added new "last message" logic, before useReducer

backend/controllers/whatsapp.js

@@ -0,0 +1,15 @@
+const Whatsapp = require("../models/whatsapp");
+
+exports.getSession = async (req, res, next) => {
+	try {
+		const dbSession = await Whatsapp.findOne({ where: { id: 1 } });
+
+		if (!dbSession) {
+			return res.status(200).json({ message: "Session not found" });
+		}
+
+		return res.status(200).json(dbSession);
+	} catch (err) {
+		next(err);
+	}
+};