diff --git a/client/src/api/authUrl.ts b/client/src/api/authUrl.ts
index 240d130d..cebd2f92 100644
--- a/client/src/api/authUrl.ts
+++ b/client/src/api/authUrl.ts
@@ -1,4 +1,4 @@
-export async function getAuthUrl(url: string, purpose: string): Promise<string> {
+export async function getAuthUrl(url: string, purpose: 'download'): Promise<string> {
   if (!url) return url
   try {
     const resp = await fetch('/api/auth/resource-token', {