My code checks if a user is available. See snippet below:

const users = ['user1', 'user2', 'user3', 'user4']
const usersToAdd = 2

const getRandomWorker = (userArray) => {
  return userArray[Math.floor(userArray.length * Math.random())]
}

const availableUsers = []

for (let i = 0; i < usersToAdd; i += i) {
  let randomWorker = getRandomWorker(users)
  let didAddWorker = false

  while (!didAddWorker) {
    if (checkIfUserAvailable(randomWorker)) {
      availableUsers.push(randomWorker)
      users = users.filter((user) => user !== randomWorker)
      didAddWorker = true
    } else if (!users.length) {
      didAddWorker = true
    } else {
      users = users.filter((user) => user !== randomWorker)
    }
  }
}

My only problem is that it contains unsafe references to variables(s) because I get the following error:

Function declared in a loop contains unsafe references to variable(s) randomWorker.

I've searched around and fiddled with my code but I can't get rid of the error. I don't know where to look anymore.