Why do you need to manage my [Google] contacts for me to signup? A plain email + password signup alternative would be nice! Tried to opt out of the contacts sh

Why do you need to manage my [Google] contacts for me to signup? A plain email + password signup alternative would be nice! Tried to opt out of the contacts sharing, but I got stuck in an infinite loop and couldn't find a signup option without the Google oAuth. The product itself looks awesome, but I can't try it out because I don't want to give away access to my entire Google account.