Role "unicorn_user" does not exist.

[sheigoldberg]

I am trying to get the docker containers running but i get this error message

2024-09-13 14:57:18 2024-09-13 12:57:18.308 UTC [340] FATAL: password authentication failed for user "unicorn_user"
2024-09-13 14:57:18 2024-09-13 12:57:18.308 UTC [340] DETAIL: Role "unicorn_user" does not exist.

.env settings
POSTGRES_USER=unicorn_user
POSTGRES_PASSWORD=magical_password
POSTGRES_DB=calendso
DATABASE_HOST=database:5432
DATABASE_URL=postgresql://${POSTGRES_USER}:${POSTGRES_PASSWORD}@${DATABASE_HOST}/${POSTGRES_DB}

What am I doing wrong?