How to login into Camunda dashboard?

I am setting up camunda using helm charts. I also configured my own RDS database for camunda.
I successfully configured the camunda but the issue is I am unable login into Dashboard. I used demo and demo as username and password and it’s throwing me the error.

Wrong credentials, locked user or missing access rights to the application

I don’t know what is the issue, if anyone knows it please reply.

Thanks