Managing User Types and Assigning User Groups with Cognito

Hello Guys,

We are currently developing an application with two main user categories. We have 2 separate front-end applications built for 2 user categories Our front end is built using Next.js, and our back end is serverless (Lambda/nodejs). We are using the Cognito user pool for user authentication.

We allow users to sign in using Google, Apple, and email. Upon sign-up, we need a way to assign each user to a specific user group. The challenge we're facing is finding a method to pass each user's user type to the back-end so that it can handle Cognito Lambda triggers or Cognito APIs to add users to their respective groups. Specifically, we are looking for a way to pass custom parameters to the back end and access them when users sign up using Google or email.

Is there a way where we can pass user type from the FE to the BE during user signup using Google or email and then add users to the respective user group?

Thanks in advance.