Login registered user in aem via component

I have created a registration form which creates user in home/users in CRXDE now,I want to create a login component that authenticates and sign in the users that are already created in AEM home/users.

The link found by me was not of much help.Link to the document : https://experienceleague.adobe.com/docs/experience-manager-cloud-service/content/sites/authoring/personalization/user-and-group-sync-for-publish-tier.html?lang=en

Is there any other documentations for further guidance?

Thank you in advance.