Input value (SOLVED)

hello everyone, i wonder how i can use the word written in the input of my service
input: test
and i want to use that word “test” in my service

    let url = URL_SERVICES + "Email/email/"+ test;
    .subscribe ( resp => {
       let data = resp.json();
       this.resu = data.Email;

if someone, have the same issue this may help u = item.assistant_Email;