follow guidelines

pages/api/auth/[...nextauth].ts

@@ -5,7 +5,7 @@ import GitHubProvider from 'next-auth/providers/github'
 
 import { MongoDBAdapter } from '@next-auth/mongodb-adapter'
 import { MONGO_URI } from '../../../db'
-import { MongoClient } from 'mongodb'
+import { MongoClient, ServerApiVersion } from 'mongodb'
 
 let client: MongoClient
 
@@ -14,7 +14,13 @@ const GITHUB_USERS_GRANTED = ['111471']
 
 async function getMongoClient() {
   if (!client) {
-    client = new MongoClient(MONGO_URI)
+    client = new MongoClient(MONGO_URI, {
+      serverApi: {
+        version: ServerApiVersion.v1,
+        strict: true,
+        deprecationErrors: true,
+      }
+    })
     await client.connect()
   }