[keycloak-user] How to retrieve user ID from Keycloak to my web app

Before, my web app is has its own login form to authenticate users. But since I have connected my web app to Keycloak to authenticate the users now, my web app does not need to have the login form anymore, hence I need to remove it. This was roughly how I retrieved the users information before Keycloak:- if (chkLogin(getUserID(), getUserPwd())) { MaintainUser mu = new MaintainUser(); this.usrInfo = null; String[] usr = mu.validatePassword(getUserID(), getUserPwd()); } This is not the full coding, but basically I use the getUserID method to retrieve the users info and check it for authentication before. How do I perform this if I want to retrieve the user ID from the Keycloak admin console? Regards, Kunal Kumar