You do not need an invite code to log-in to your existing Highlighter account. Please follow these steps to log-in: 

1. Go to app.letshighlight.comUnder "Already have an account" > Select "Sign in with Google" (circled below):
Screen Shot 2021-11-18 at 10.33.23 AM.png

2. Once you click "Sign in with Google", you will see this page. Select > Continue with GoogleScreen Shot 2021-11-18 at 10.34.11 AM.png

3. Then, log-in with your registered Highlighter email
 to access your account and complete any survey(s)