Need help with JS!

let message = '';
let student;
let question;
var i;
let security;
let input;
let returned = false;
let late = false;
const odds = document.querySelectorAll('li:nth-child(odd)');
const evens = document.querySelectorAll('li:nth-child(even)');
const libraryAccess = document.getElementById('library');
const user = document.getElementById('user');
function signIn() {
   security = prompt("Type name to continue");
}

for (let i = 0; i < odds.length; i += 1) {
  odds[i].style.backgroundColor = 'red';
}

for (let i = 0; i < evens.length; i += 1) {
  evens[i].style.backgroundColor = 'lightgreen';
}
//Custom Function that replaces document.write with a better alternative
const print = (message) => {
  var outputDiv = document.getElementById('output');
  outputDiv.innerHTML = message;
}

// These are the categories
const getReport = (student) => {
  let report = `<h1 class="titleName" id="name"> ${student.name} </h1>`;
  `<ol class="lists">`
  report += `<li> MemberShip: ${student.memberShip} </li>`;
  report += `<li> MemberSince: ${student.memberSince} </li>`;
  report += `<li> Points: ${student.points} </li>`;
  report += `<li> Checking: $${student.checking} </li>`;
  report += `<li> Debts: ${student.debts} </li>`;
  report += `<li> Savings: $${student.savings + parseFloat(student.OuncesofSilver * 17.51) + parseFloat(student.goldGrams * 43.47)} </li>`;
  report += `<li> Ounces of Silver: ${student.OuncesofSilver} </li>`;
  report += `<li> Books Due: ${student.booksDue} </li>`;
  report += `<li> GoldGrams: ${student.goldGrams} </li>`;
  `</ol>`
  return report;
}
// Alerts for when something goes above or below certain criteria
const notify = (urgent) => {

  if (returned === true) {
    students[i].points += 10;
  }
  if (late === true) {
    students[i].points -= 10;
  }
  //if (payedOnTime === true) {
  //  students[i].points += 10;
  //}
  if (students[i].checking > 20) {
    students[i].points += 1;
  }

  if (students[i].points > 250) {

    alert(" 1 Month Free for any membership! OR wait for a bigger Reward!");

  }
  if (students[i].points > 500) {

    alert("50% of membership for 5 whole MONTHS! OR wait for better prize!");

  }
  if (students[i].points > 1000) {

    alert("Upgrade to next membership!");

  }
  if (students[i].checking < 20) {

    alert("Your checking account is low on cash! Get it to 20 dollars or you'll lose points soon!");

  }
  if (students[i].debts > 0) {

    alert("You owe money pay it off ASAP!");

  }
  if (students[i].booksDue > 0) {

    alert("You have book(s) due!");

  }
  if (students[i].savings < 1 && students[i].OuncesofSilver < 1 && students[i].goldGrams < 1) {

    alert("You need to start saving!");

  }
  library.addEventListener('click', () => {
    if (students[i].booksDue === 0) {
      window.location = "library.html";
    } else {
      alert("You can not use this until you return your book!");
    }
  });

}

// security to only allow person with right password to log into their specific account
function secure() {
  if (security === 'luke') {
    var i = 0;
    notify(student);
    message = getReport(students[0]);
    print(message);
    console.log("hey");
  }
  if (security === 'julie') {
    var i = 1;
    notify(student);
    message = getReport(students[1]);
    print(message);
  }
  if (security === 'brendon') {
    var i = 2;
    notify(student);
    message = getReport(students[2]);
    print(message);
  }
}

print(message);
print(message);
user.addEventListener('click', signIn, secure);