let search = (username, surname, email, dob, page = 1, perPage = 20) => {
    if(username !== '' && username !== undefined)
        body['username'] = username;
    if(surname !== '' && surname !== undefined)
        body['surname'] = surname;
    if(email !== '' && email !== undefined)
         body['email'] = email;
    if(dob !== '' && dob !== undefined)
        body['dob'] = dob;
    let options = {
        method: "PUT",
        body: JSON.stringify(body),
        headers: {
            "Content-Type": 'application/json'
        },
        credentials: 'same-origin'
    };
    return options;
}