do logout from rewards service only if token is preset

ui/snippets/auth/useLogout.ts

@@ -34,12 +34,14 @@ export default function useLogout() {
 
       if (config.features.rewards.isEnabled) {
         const rewardsToken = cookies.get(cookies.NAMES.REWARDS_API_TOKEN);
+        if (rewardsToken) {
           await apiFetch('rewards_logout', { fetchParams: {
             method: 'POST',
             headers: { Authorization: `Bearer ${ rewardsToken }` },
           } });
           cookies.remove(cookies.NAMES.REWARDS_API_TOKEN);
         }
+      }
 
       queryClient.resetQueries({
         queryKey: getResourceKey('user_info'),