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

SuperTokens.com

I have implemented supertoken's login page on the URL  https://pcc-stage.fairmatic.com/auth . 
I have implemented a redirection from  https://stage01-post-bind-platform.stage.fairmatic.org/admin/policydata/ to  https://pcc-stage.fairmatic.com/auth  for auth . 
My use case is that once authenticated on https://pcc-stage.fairmatic.com/auth  , I want to redirect the user to https://stage01-post-bind-platform.stage.fairmatic.org/admin/policydata/  basically to the path from where the request came from . 
How can I do it in the frontend sdk ?

we do not do auto redirections actoss sub domains. Only to different path within the same domain

if you want to implement this, you will have to manually handle redirection. From subdomain -> auth domain on some path where you save the redirection in localstorage -> navigate to /auth -> navigates back to the redirection path -> manually navigate to the original sub domain based on whats in localstorage