If you want to sign up to Instant, there are two ways of doing that: using Magic links and using your Google account.
Magic link
Go to https://app.instant.so/register, enter your name and email address, and click Continue. You’ll receive an email with a magic link. Clicking the button in that email will take you to Instant and directly log you in.
When you want to log in in the future, you’ll be sent another magic link email to log in.
Google login
Go to https://app.instant.so/register and click Continue with Google, you’ll be asked to choose your Google account to complete your sign up.
When you want to log in in the future, you only need to click the Continue with Google button to log in.