Keycloak API strategy

1. Request groups from kc /admin/realms/{realm}/groups/{id}
2. Request roles of groups from kc /admin/realms/{realm}/groups/{id}

Case 1: Only kc groups are requested

3. Get members of requested groups from kc /admin/realms/{realm}/groups/{id}/members
4. Map kc groups and roles to members

Case 2: Some kc roles are requested

3. Get groups for every requested roles
4. Get all requested groups and merge with groups from step 3
5. Get all groups of users from kc /admin/realms/{realm}/users/{id}/groups
6. Get all roles of users from kc /admin/realms/{realm}/users/{id}/role-mappings/realm
7. Map kc groups and roles to users