How do I create or add a user to rabbitmq?

I have found this very useful

This adds a new user and password

rabbitmqctl add_user username password

This makes the user a administrator

rabbitmqctl set_user_tags username administrator

This sets permissions for the user

rabbitmqctl set_permissions -p / username ".*" ".*" ".*"

See more here https://www.rabbitmq.com/rabbitmqctl.8.html#User_Management