Xumm OAuth2 Sign In for Auth0, based on Developer Question: https://xumm.readme.io/discuss/62af82ada6faf1007c0e89f3

user-profile-script.js

function(accessToken, ctx, callback) {
  const url = "https://oauth2.xumm.app/userinfo";
  request.get(
    { url, headers: { 'Authorization': 'Bearer ' + accessToken, } },
    (err, resp, body) => {
      if (err) {
        return callback(err);
      }

      if (resp.statusCode !== 200) {
        return callback(new Error(body));
      }

      let bodyParsed;
      try {
        bodyParsed = JSON.parse(body);
      } catch (jsonError) {
        return callback(new Error(body));
      }

      const profile = {
        user_id: bodyParsed.sub,
        email: bodyParsed.email,
        name: bodyParsed.name,
        kycApproved: bodyParsed.kycApproved,
        proSubscription: bodyParsed.proSubscription,
        picture: bodyParsed.picture,
      };

      callback(null, profile);
    }
  );
}