docs: added change of realm example

README.md

@@ -319,4 +319,10 @@ idps = keycloak_admin.get_idps()
 # Create a new Realm
 keycloak_admin.create_realm(payload={"realm": "demo"}, skip_exists=False)
 
+# Changing Realm
+keycloak_admin = KeycloakAdmin(realm_name="main", ...)
+keycloak_admin.get_users() # Get user in main realm
+keycloak_admin.realm_name = "demo" # Change realm to 'demo'
+keycloak_admin.get_users() # Get users in realm 'demo'
+keycloak_admin.create_user(...) # Creates a new user in 'demo'
 ```