BAU: We don't want phone number to be returned if it's falsy

This was returning empty string

src/components/user-info/user-info-controller.ts

@@ -52,7 +52,7 @@ export const userInfoController = async (
   }
 
   if (validationResult.scopes.includes("phone")) {
-    userInfo.phone_number = config.getPhoneNumber() ?? undefined;
+    userInfo.phone_number = config.getPhoneNumber() || undefined;
     userInfo.phone_number_verified = config.getPhoneNumberVerified();
   }