[keycloak-user] Add user with a pre existing client role and group through Java

Hi, I am trying to add a user with a pre existing client role and group through java code in my springboot server. I want to achieve this through a logged in user that can only see / manage the users of his/her group and also the new created user should be assigned a group and a  client role on creation. The group should be the same as the group of the user that is logged in and the client role could be hardcoded. Thanks, Vikram