Why can't I connect to my managed postgres db cluster?

This is my connection parameter, everything is copied straight from the cluster address details into my OS environment variables.

host = {
    "host" : os.environ.get('DO_HOST'),
    "database" : os.environ.get('DO_DB'),
    "user" : doadmin,
    "password" : os.environ.get('DO_PASSWORD'),
}

However, I see that this doesn’t work, and instead get this error, anjar is my windows username. My postgres driver has always worked, the issue is purely me trying to connect to the remote cluster via these parameters.

FATAL:  role "anjar" does not exist