diff --git a/como_auth/src/auth.rs b/como_auth/src/auth.rs
index 9f09726..ea9281f 100644
--- a/como_auth/src/auth.rs
+++ b/como_auth/src/auth.rs
@@ -7,7 +7,7 @@ use oauth2::url::Url;
 
 use crate::{
     introspection::IntrospectionService,
-    oauth::OAuth,
+    oauth::{OAuth, ZitadelConfig},
     session::{SessionService, User},
     AuthClap, AuthEngine,
 };
@@ -23,16 +23,29 @@ pub trait Auth {
 pub struct AuthService(Arc<dyn Auth + Send + Sync + 'static>);
 
 impl AuthService {
-    pub async fn new(config: &AuthClap) -> anyhow::Result<Self> {
+    pub async fn new(config: &AuthClap, session: SessionService) -> anyhow::Result<Self> {
         match config.engine {
             AuthEngine::Noop => Ok(Self::new_noop()),
-            AuthEngine::Zitadel => Ok(Self::new_zitadel()),
+            AuthEngine::Zitadel => {
+                let oauth: OAuth = ZitadelConfig::try_from(config.zitadel.clone())?.into();
+                let introspection: IntrospectionService =
+                    IntrospectionService::new_zitadel(config).await?;
+
+                Ok(Self::new_zitadel(oauth, introspection, session))
+            }
         }
     }
 
-    pub fn new_zitadel() -> Self {
-        todo!()
-        //Self(Arc::new(ZitadelAuthService {}))
+    pub fn new_zitadel(
+        oauth: OAuth,
+        introspection: IntrospectionService,
+        session: SessionService,
+    ) -> Self {
+        Self(Arc::new(ZitadelAuthService {
+            oauth,
+            introspection,
+            session,
+        }))
     }
 
     pub fn new_noop() -> Self {
diff --git a/como_auth/src/lib.rs b/como_auth/src/lib.rs
index ee3cd76..9812190 100644
--- a/como_auth/src/lib.rs
+++ b/como_auth/src/lib.rs
@@ -8,6 +8,7 @@ mod session;
 
 pub use auth::{Auth, AuthService};
 use session::SessionClap;
+pub use session::SessionService;
 
 #[derive(clap::ValueEnum, Clone, PartialEq, Eq, Debug)]
 pub enum AuthEngine {
diff --git a/como_auth/src/session.rs b/como_auth/src/session.rs
index da2b0f8..4e3a12d 100644
--- a/como_auth/src/session.rs
+++ b/como_auth/src/session.rs
@@ -4,6 +4,7 @@ use async_sqlx_session::PostgresSessionStore;
 use async_trait::async_trait;
 use axum_sessions::async_session::{Session as AxumSession, SessionStore as AxumSessionStore};
 use serde::{Deserialize, Serialize};
+use sqlx::PgPool;
 
 use crate::{AuthClap, SessionBackend};
 
@@ -31,7 +32,19 @@ impl SessionService {
         match config.session_backend {
             SessionBackend::InMemory => Ok(Self(Arc::new(InMemorySessionService {}))),
             SessionBackend::Postgresql => {
-                Ok(Self(Arc::new(PostgresSessionService { store: todo!() })))
+                let postgres_session = PostgresSessionStore::new(
+                    config
+                        .session
+                        .postgresql
+                        .conn
+                        .as_ref()
+                        .expect("SESSION_POSTGRES_CONN to be set"),
+                )
+                .await?;
+
+                Ok(Self(Arc::new(PostgresSessionService {
+                    store: postgres_session,
+                })))
             }
         }
     }
diff --git a/como_infrastructure/src/register.rs b/como_infrastructure/src/register.rs
index 7af9805..7aa68e1 100644
--- a/como_infrastructure/src/register.rs
+++ b/como_infrastructure/src/register.rs
@@ -1,7 +1,7 @@
 use std::sync::Arc;
 
 use async_sqlx_session::PostgresSessionStore;
-use como_auth::AuthService;
+use como_auth::{AuthService, SessionService};
 use como_core::{items::DynItemService, projects::DynProjectService, users::DynUserService};
 use tracing::log::info;
 
@@ -28,7 +28,8 @@ impl ServiceRegister {
     pub async fn new(pool: ConnectionPool, config: Arc<AppConfig>) -> anyhow::Result<Self> {
         info!("creating services");
 
-        let auth = AuthService::new(&config.auth).await?;
+        let session = SessionService::new(&config.auth).await?;
+        let auth = AuthService::new(&config.auth, session).await?;
 
         let s = match config.database_type {
             DatabaseType::Postgres => {