diff --git a/module/src/auth.ts b/module/src/auth.ts
index 1e4e37d..e186dad 100644
--- a/module/src/auth.ts
+++ b/module/src/auth.ts
@@ -299,6 +299,7 @@ interface Subscription {
 };
 
 interface BaseAccountData {
+    userId?: string;
     email?: string;
     subscription?: Subscription;
     banned: boolean;
@@ -444,6 +445,7 @@ function parseUserData(appData: UserAppData | null): User {
     if (!appData) return anonUser();
 
     return {
+        userId: appData.user_id,
         email: appData.email,
         subscription: parseSubscriptionData(appData),
         teamSubscription: appData.team_subscription
diff --git a/module/src/types.ts b/module/src/types.ts
index 173ad5a..32737c1 100644
--- a/module/src/types.ts
+++ b/module/src/types.ts
@@ -36,6 +36,7 @@ export interface SubscriptionPricing {
 
 // User app data, as returned by the API
 export type UserAppData = {
+    user_id: string;
     email: string;
     feature_flags?: string[];
     banned?: boolean;
@@ -49,6 +50,7 @@ export type UserAppData = {
 
 // User billing data, as returned by the API
 export type UserBillingData = {
+    user_id: string;
     email: string;
     banned?: boolean;
     transactions: TransactionData[] | null;