Once the project deployed, you must init it :

1- Generate a domain to access it outside of railway.

2- Download vault cli

3- Run : $env:VAULT_ADDR="https://${{GENERATED_DOMAIN}}"

4- Run : vault operator init

5- Store unseal keys securly ! For more information: https://developer.hashicorp.com/vault/docs/concepts/seal

6- Run $env:VAULT_TOKEN="${{GENERATED_TOKEN}}"

7- Mount services you need (Kvv1, Kvv2, etc...)

8- Create tokens for your services as you need

9- Everything you want...

10- Revoke root token (You can regenerate one using unseal keys, see: https://developer.hashicorp.com/vault/tutorials/operations/generate-root)

11- Remove generated domain (use private network in your railway project)