SuperTokens is an open source authentication solution offering features like: Different types of login: Email / password, Passwordless (OTP or Magic link based).

SuperTokens.com

hello, this is maybe a docker problem but I got a problem with my supertokens. It cannot connect to the postgresql container.

```
01 Apr 2022 07:20:52:829 +0000 | DEBUG | pid: ab12b59e-98a4-4068-9cc7-cdbdf3f76117 | [main] thread | io.supertokens.storage.postgresql.HikariLoggingAppender.doAppend(HikariLoggingAppender.java:136) | SuperTokens - Starting...


01 Apr 2022 07:20:52:832 +0000 | DEBUG | pid: ab12b59e-98a4-4068-9cc7-cdbdf3f76117 | [main] thread | io.supertokens.storage.postgresql.HikariLoggingAppender.doAppend(HikariLoggingAppender.java:136) | SuperTokens - Failed to create/setup connection: Connection to localhost:5432 refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.


01 Apr 2022 07:20:52:833 +0000 | DEBUG | pid: ab12b59e-98a4-4068-9cc7-cdbdf3f76117 | [main] thread | io.supertokens.storage.postgresql.HikariLoggingAppender.doAppend(HikariLoggingAppender.java:136) | SuperTokens - Cannot acquire connection from data source


01 Apr 2022 07:20:52:834 +0000 | ERROR | pid: ab12b59e-98a4-4068-9cc7-cdbdf3f76117 | [main] thread | io.supertokens.storage.postgresql.HikariLoggingAppender.doAppend(HikariLoggingAppender.java:132) | SuperTokens - Exception during pool initialization.


Trying again in a few seconds for 59.0 mins...

01 Apr 2022 07:20:52:836 +0000 | INFO | pid: ab12b59e-98a4-4068-9cc7-cdbdf3f76117 | [main] thread | io.supertokens.storage.postgresql.ConnectionPool.initPool(ConnectionPool.java:155) | Trying again in a few seconds for 59.0 mins...
```

```
version: '3.1'

services:
  supertoken-users:
    image: registry.supertokens.io/supertokens/supertokens-postgresql
    ports:
      - '3567:3567'
    environment:
      - POSTGRESQL_USER=root
      - POSTGRESQL_PASSWORD=example
      - POSTGRESQL_HOST=host
      - POSTGRESQL_PORT=5432
      - POSTGRESQL_DATABASE_NAME=authdb

  db:
    image: postgres
    restart: always
    ports:
      - '5432:5432'
    environment:
      POSTGRES_USER: root
      POSTGRES_PASSWORD: example
      POSTGRES_DB: authdb

  adminer:
    image: adminer
    restart: always
    ports:
      - 8080:8080
```

`POSTGRESQL_HOST` should be `db`? Cause the name of the db in the compose file is `db`

wait so host is not a `url` but a `docker container` itself?

so the supertoken container is trying to connect to a postgres container named db

Well. it's the the address on which the db is reachable

It is the address of the postgresql container

but in docker network, that is = to the name of the service

ok, I thought you have to input the url of the database

im not sure what you mean by url of database and how that's different from the address on which the db is hosted at