Unable to login to the RabbitMQ using guest

I have the following issue. I deleted the guest user and now basically I cant login to rabbitmq using guest-guest.

I have tried the following things:

1) I did uninstall the service and install it again. It didn't work. It worked for some other colleagues but it didn't work for me. I have tried to uninstall/install nearly 10 times. I can see the service disappearing and readded. Still no success

2) Config file. The config file resides in the following location : C:\Program Files (x86)\RabbitMQ Server\rabbitmq_server-3.5.1\etc\rabbitmq.

I removed the comments from the following setting :

It was like that %% {loopback_users, []},

and now it is {loopback_users, []},

still no success. I restart the service every time i modify the config file but still no success. It was working before I delete the guest user. Does anyone know what else could I do or what am i doing wrong??

Thanks!!