Many changes.

pages/api/routes/collections/index.ts

@@ -0,0 +1,24 @@
+import type { NextApiRequest, NextApiResponse } from "next";
+import { getServerSession } from "next-auth/next";
+import { authOptions } from "pages/api/auth/[...nextauth]";
+import getCollections from "@/lib/api/controllers/collections/getCollections";
+import postCollections from "@/lib/api/controllers/collections/postCollection";
+
+type Data = {
+  response: object[] | string;
+};
+
+export default async function handler(
+  req: NextApiRequest,
+  res: NextApiResponse<Data>
+) {
+  const session = await getServerSession(req, res, authOptions);
+
+  if (!session?.user?.email) {
+    return res.status(401).json({ response: "You must be logged in." });
+  }
+
+  if (req.method === "GET") return await getCollections(req, res, session);
+
+  if (req.method === "POST") return await postCollections(req, res, session);
+}