Unable to use `mongodb` client

 ✓ Compiled /api/auth/[...all] in 919ms

 ERROR   TypeError e.collection is not a function
          Better Auth
  at Object.findOne (.next/server/chunks/node_modules_better-auth_dist_c1259f._.js:4993:104)
  at Object.findUserByEmail (.next/server/chunks/node_modules_better-auth_dist_c1259f._.js:3693:29)
    ...
 POST /api/auth/sign-up/email?currentURL=http%3A%2F%2Flocalhost%3A3000%2F 500 in 1829ms
Pinged your deployment. You successfully connected to MongoDB!

import { betterAuth } from "better-auth";
import { mongodbAdapter } from "better-auth/adapters/mongodb";
import { client } from "@/lib/db/mongodb";

export const auth = betterAuth({
  database: mongodbAdapter(client),
  emailAndPassword: {
    enabled: true,
  },
});

const { MongoClient, ServerApiVersion } = require("mongodb");

const uri = process.env.MONGODB_URI as string;

export const client = new MongoClient(uri, {
  serverApi: {
    version: ServerApiVersion.v1,
    strict: true,
    deprecationErrors: true,
  },
});
async function run() {
  try {
    // Connect the client to the server (optional starting in v4.7)
    await client.connect();
    // Send a ping to confirm a successful connection
    await client.db("admin").command({ ping: 1 });
    console.log(
      "Pinged your deployment. You successfully connected to MongoDB!"
    );
  } finally {
    // Ensures that the client will close when you finish/error
    await client.close();
  }
}
run().catch(console.dir);