Next-Auth JWT Session Token

Question

Currently I am returning the users email to the session as a JWT. This is working just fine. Now I am trying to return the users username with the email as a JWT. If I am to console.log the username, it is appearing in the terminal. Yet, if I am logging the session.user in my getServerSideProps function I am only able to view the email. Any tips?

export default NextAuth({
  session: { jwt: true },
  providers: [
    CredentialsProvider({
      async authorize(credentials) {
        const client = await connectToDatabase();

        const userCollection = client.db().collection("users");

        const user = await userCollection.findOne({ email: credentials.email });

        console.log(user.userName);

        if (!user) {
          client.close();

          throw new Error("No user found!");
        }

        const isValid = await comparePasswords(
          credentials.password,
          user.password
        );

        if (!isValid) {
          client.close();

          throw new Error("Invalid password");
        }

        client.close();

        if (user) {
          return {
            email: user.email,
            userName: user.userName,
          };
        } else {
          return null;
        }
      },
    }),
  ],
});