Added poll create route in backend✔️

backend/src/services/poll.service.js

@@ -0,0 +1,23 @@
+import mongoose from "mongoose";
+import { createPollByData } from "../repositories/poll.repo.js";
+
+export async function createPollService(title, description, options, userId) {
+    try {
+        const optionsData = options.map(option => ({
+            name: option,
+            _id : new mongoose.Types.ObjectId()
+        }));
+
+        const data = {
+            title,
+            description,
+            options : optionsData,
+            creatorId: userId
+        }
+        const poll = await createPollByData(data);
+        return poll;
+    }
+    catch(err){
+        throw err;
+    }
+}