Reference documents: https://www.rabbitmq.com/management.html#permissions
After installing rabbitmq, encounters a problem, a new account can not log in rabbitmq UI interface, suggesting login failed, eventually checked the official document discovery, rabbitmq management is based on the tag to determine whether a user has permission to log in to the UI.
About tag settings, refer to the document:
https://www.rabbitmq.com/management.html#permissions
It is necessary to use the command: rabbitmqctl set_user_tag myuser administrator to set user tag, then you can landed.