SuperTokens is an open source authentication solution offering features like: Different types of login: Email / password, Passwordless (OTP or Magic link based).

SuperTokens.com

Hi again,  I wanted to know if there is a way I can test with the cookies on localhost?  I have set a cookie domain on my Supertokens server.  but I wanted test things locally.. So is there a work around for that?

Yea. It’s possible. You can use env vars to set a different config for local setup

To simulate sub domains on local, you can even modify your /etc/hosts file (on Mac) to make any domain point to localhost.