Type tParams = Assure; export default async operate Challenge( params : params: tParams ) const slug = await params; const productID = slug[one]; // other code right here FutureWarning: Downcasting habits in `replace` is deprecated and can be eradicated inside a future Model. To retain the previous habits, explicitly get https://alphawireless.com/future-proofing-american-utilities-why-900-mhz-is-critical-for-utility-communications/