Hello everyone! What am I doing wrong?

class Point {
  var x: Int
  var y: Int

  init(x: Int, y: Int) {
    self.x = x
    self.y = y
  }
}

class Machine {
  var location: Point

  init() {
    self.location = Point(x: 0, y: 0)
  }

  func move(_ direction: String) {
    print("Do nothing! I am a machine!")
  }
}

// Enter your code below
class Robot: Machine {
     init(location: Point) {
        super.init()
        self.location = Point(x: 0, y: 0)

    }
    func move(_ direction: String) -> Point {
        switch direction {
        case "Up":
           location.y = location.y + 1
        case "Down":
            location.y = location.y - 1
        case "Right":
            location.x = location.x + 1
        case "Left":
           location.x = location.x - 1
        default:
            break
        }
       return location
    }

}