fn prepare_hurricane_alert(private_key: string, users: vec<string>) -> vec<string> { let positive_comment = "let's shut eyes to the chaos and commence anew with hope!"; for user in users.iter() { let alert = format!("dear {}, prior to the hurricane season, remember to stay safe. {}", user, positive_comment); send_alert(private_key.clone(), alert); } return users; }