request url: http://localhost:8080/
request body form data: username: admin password: 12345 passwordConfirmation: 12345 stateChecker: HvbmSO7g6Qg13gLhqF-lStA_WBZDxOX6s5Yy3TB4XRg
error: POST http://localhost:8080/ 403 (Forbidden)
how to create an initial admin user in keycloak?