Opening an animated door with a keycard

I am trying to open a door with a keycard. I have my door open/close script, but would like to add more code stating "This door will not open unless I have a card in my inventory." I need to pickup the card and be able to open the door afterwards. I have seen many tutorials on this, but none that already has already made animation on it. This is my code so far:

 #pragma strict
  
 var DoorState = false;
 var InFrontOfTheDoor = false;
 var Door : GameObject;
 var SoundClose : GameObject;
 var SoundOpen : GameObject;
  
 function Update () 
 {
     if(Input.GetKeyDown(KeyCode.E) && InFrontOfTheDoor)
     {
        if (DoorState == false)
        {
          ChangeDoorStateOpen{};
        }
        else
        {
          ChangeDoorStateClosed();
        }
  
     }
 }
 function ChangeDoorStateOpen()
 {
     DoorState = true;
     Door.animation.CrossFade("DoorOpen");
     SoundOpen.audio.Play();
 }
 function ChangeDoorStateClosed()
 {
     DoorState = false;
     Door.animation.CrossFade("DoorClose");
     SoundClose.audio.Play();
 }
 function OnTriggerEnter()
 {
     InFrontOfTheDoor = true;
 }
 function OnTriggerExit()
 {
     InFrontOfTheDoor = false;
 }