diff --git a/apps/api/src/services/auth0Service.js b/apps/api/src/services/auth0Service.js
new file mode 100644
index 0000000000..9b031c5263
--- /dev/null
+++ b/apps/api/src/services/auth0Service.js
@@ -0,0 +1,24 @@
+import { signAccessToken } from "../utils/jwt.js";
+
+export async function registerUser(payload) {
+  // TODO: persist new user via Prisma
+  const userId = `usr_${Date.now()}`;
+  return {
+    id: userId,
+    email: payload.email,
+    role: payload.role,
+    token: signAccessToken({ sub: userId, role: payload.role })
+  };
+}
+
+export async function loginUser(payload) {
+  // TODO: verify password hash against stored user record
+  return {
+    email: payload.email,
+    token: signAccessToken({ sub: "usr_existing", role: "client" })
+  };
+}
+
+export async function refreshToken() {
+  return { token: signAccessToken({ sub: "usr_existing", role: "client" }) };
+}
\ No newline at end of file
diff --git a/apps/api/src/services/authService.js b/apps/api/src/services/authService.js
index 897da68699..45c7b79bf9 100644
--- a/apps/api/src/services/authService.js
+++ b/apps/api/src/services/authService.js
@@ -1,14 +1,15 @@
 import { signAccessToken } from "../utils/jwt.js";
 
 export async function registerUser(payload) {
-  // TODO: persist new user via Prisma
+  const userId = `usr_${Date.now()}`;
   return {
-    id: `usr_${Date.now()}`,
+    id: userId,
     email: payload.email,
     role: payload.role,
-    token: signAccessToken({ sub: `usr_${Date.now()}`, role: payload.role })
+    token: signAccessToken({ sub: userId, role: payload.role })
   };
 }
+}
 
 export async function loginUser(payload) {
   // TODO: verify password hash against stored user record