Upgraded to Next Auth v5

app/api/account/route.ts

@@ -1,7 +1,6 @@
 import { db } from "@/lib/db"
 import { NextResponse } from "next/server";
-import { getServerSession } from "next-auth";
-import { generateToken } from "../token/route";
+import { auth } from "@/auth";
 import fetchUserUsingAPI from "@/lib/validate-api";
 
 
@@ -16,7 +15,7 @@ export async function GET(req: Request) {
 
 export async function POST(req: Request) {
     try {
-        const session = await getServerSession()
+        const session = await auth()
         const user = session?.user?.name
         if (!user) {
             return new NextResponse("Internal Error", { status: 401 })
@@ -24,26 +23,26 @@ export async function POST(req: Request) {
         
         const exist = await db.user.findFirst({
           where: {
-            username: user.toLowerCase() as string
+            name: user
           }
         });
   
         if (exist) {
             return NextResponse.json({
               id: exist.id,
-              username: exist.username
+              username: exist.name
             });
         }
     
         const newUser = await db.user.create({
           data: {
-            username: user.toLowerCase() as string,
+            name: user,
           }
         });
 
         return NextResponse.json({
           id: newUser.id,
-          username: newUser.username
+          username: newUser.name
         });
     } catch (error) {
         console.log("[ACCOUNT]", error);