How to access RabbitMq publicly

I have installed & setup the Rabbitmq on Centos remote server. Later I created an file "rabbitmq.config" and added the line

[{rabbit, [{loopback_users, []}]}]

and then restarted the rabbitmq server. Again tried to login the rabbitmq management web interface from my local machine using the guest credentials, but getting

login failed

error message.What is the proper way to empty the loopback user settings for Rabbitmq in Centos.