--- credentials: secret_key_base: description: Main secret used by OpenProject to sign cookies and encrypt session data algorithm: sha256 validation: ^[a-f0-9]{64}$ auth_source_sso_secret: description: Shared secret appended to the trusted X-Remote-User header so only the front proxy can drive header-based SSO algorithm: sha256 validation: ^[a-f0-9]{64}$