Members Only Step 5

[...nexauth].js

      async authorize(credentials) {
        try {
          const siwe = new SiweMessage(JSON.parse(credentials?.message || "{}"))
          const domain = process.env.DOMAIN
          if (siwe.domain !== domain) {
            return null
          }

          if (siwe.nonce !== (await getCsrfToken({ req }))) {
            return null
          }

          await siwe.validate(credentials?.signature || "");
          const ownsNFT = await validateNFTOwnership(siwe.address);
          if(!ownsNFT) {
            return null
          }

          return {
            id: siwe.address
          }
        } catch (e) {
          return null
        }
      },