Add guardrails

main.ts

@@ -49,7 +49,6 @@ type ApiKeySetup =
 
 export async function main(inputs: Inputs): Promise<MainResult> {
   const timer = new Timer();
-  // `await using` ensures the token is automatically revoked when the function exits
   await using tokenRef = await setupGitHubInstallationToken();
   let payload: Payload | undefined;