index.js

// Endpoint 1
app.get('/api', function(req, res){
  res.send('Welcome to our API')
})

// Endpoint 2
app.get('/api/users', function(req, res){
  res.json(userData);
})

// Endpoint 3
app.get('/api/user/:id', function(req, res){
  const id = req.params.id;
  const user = userData.find(user => user.id === id);

  if (user) {
    res.json(user)
  }
  else {
    res.send('No User Found')
  }
})