Members Only Step 6

[...nextauth].js

const validateNFTOwnership = async (address) => {
  try {
    const { abi } = require("../../../helpers/erc721.js");
    const contractAddress = '0x_NFT_CONTRACT_ADDRESS_HERE'
    const provider = await new ethers.providers.JsonRpcProvider(process.env.ALCHEMY_ENDPOINT);
    const contract = await new ethers.Contract( contractAddress , abi() , provider );  
    const balance = await contract.balanceOf(address);
    if(balance.toString() !== "0") {
      return true;
    }

    return false;
  } catch (error) {
    console.log(error);
    return null;
  }
}