rabbitmq error (argument validation): too many arguments. code example

Example: rabbitmq Error (argument validation): too many arguments.

kubectl exec -it $(kubectl get pods -o=name | grep rabbitmq ) -- rabbitmqctl -- add_user testuser testpassword

kubectl exec -it $(kubectl get pods -o=name | grep rabbitmq ) -- rabbitmqctl  set_permissions -p  my_vhost testuser "" ".*" ".*"