Implement voucher use notifications

src/routes/api/[slug]/+server.js

@@ -89,6 +89,12 @@ export async function POST(event) {
 				}else if(!result){
 					return new Response(JSON.stringify({message: "Invalid voucher"}), {headers: {'content-type': 'application/json', 'status': 400}});
 				}
+				// no need to await
+				sendNotification(event.locals.user, NotificationType.USE_VOUCHER, {
+					voucher: {code: result.code, value: result.amount},
+					balanceBefore: event.locals.user.balance,
+					balanceAfter: event.locals.user.balance + result.amount
+				});
 				return new Response(JSON.stringify(result), {headers: {'content-type': 'application/json', 'status': 200}});
 			}catch(e){
 				console.error(e);