Local host not opening

I created a django website and deployed it on heroku and have used aws s3 and amazon RDS Postgres database.

Now when i try to run python manage.py runserver in my cmd it gives error -

psycopg2.OperationalError: fe_sendauth: no password supplied

I have set os.environ.get to name, user, password and host variables in the database section in settings.py.

What should i do to resolve this? Please someone help.