This guide is written for RabbitMQ 3.9! Configuring the RabbitMQ Server For the configuration of the RabbitMQ server we will use a rabbitmq.conf and a definitions.json. I stored these files in a rabbitmq folder to keep my project folder structure clean. This setup is derived from sudos answer on StackOverflow The rabbitmq.conf deactivates the default guest user and tells RabbitMQ to load the definition file. loopback_users.guest = false management.load_definitions = /etc/rabbitmq/definitions.