How to use an unix user with RabbitMQ (Celery/Django)?

How to use an unix user with RabbitMQ (Celery/Django)?

I want to use celery and RabbitMQ with an existing unix user on my server.
How to use an unix user with RabbitMQ ?
rabbitmqctl add_vhost myvhost
rabbitmqctl set_permissions -p myvhost myUnixUser ".*" ".*" ".*"
And use it with celery
BROKER_URL = 'amqp://myUnixUser@localhost:5672/myvhost/'
Thank you