Mod-ing a Unity Door Key Switch

Hello guys, I was playing around with the "DoneDoorAnimation" that came with the Unity's Stealh project. Its the script that makes the door open when you have a key. I'm guessing it's finel to post this script here seems it's unity that wrote it? I am only looking to change ONE thing. I don't want the door to open automatically, I want it to open when you press the key. "F". Anyone feel like helping? here is the original script.

// I tried to adding something like this But it gave me an error on the VoidTriggerExit//

 if(Input.GetButton("Switch"))

///

 using UnityEngine;
 using System.Collections;
 
 public class DoneDoorAnimation : MonoBehaviour
 {
     public bool requireKey;                            // Whether or not a key is required.
     public AudioClip doorSwishClip;                    // Clip to play when the doors open or close.
     public AudioClip accessDeniedClip;                // Clip to play when the player doesn't have the key for the door.
     
     
     private Animator anim;                            // Reference to the animator component.
     private DoneHashIDs hash;                        // Reference to the HashIDs script.
     private GameObject player;                        // Reference to the player GameObject.
     private DonePlayerInventory playerInventory;    // Reference to the PlayerInventory script.
     private int count;                                // The number of colliders present that should open the doors.
     
     
     void Awake ()
     {
         // Setting up the references.
         anim = GetComponent<Animator>();
         hash = GameObject.FindGameObjectWithTag(DoneTags.gameController).GetComponent<DoneHashIDs>();
         player = GameObject.FindGameObjectWithTag(DoneTags.player);
         playerInventory = player.GetComponent<DonePlayerInventory>();
     }
     
     
     void OnTriggerEnter (Collider other)
     {
         // If the triggering gameobject is the player...
         if(other.gameObject == player)
         {
         
             
             // ... if this door requires a key...
             if(requireKey)
             {
 
 
                 // ... if the player has the key...
                 if(playerInventory.hasKey)
                     // ... increase the count of triggering objects.
                     count++;
                 else
                 {
                     // If the player doesn't have the key play the access denied audio clip.
                     audio.clip = accessDeniedClip;
                     audio.Play();
                 }
             }
             else
                 // If the door doesn't require a key, increase the count of triggering objects.
                 count++;
         }
         // If the triggering gameobject is an enemy...
         else if(other.gameObject.tag == DoneTags.enemy)
         {
             // ... if the triggering collider is a capsule collider...
             if(other is CapsuleCollider)
                 // ... increase the count of triggering objects.
                 count++;
         }
     }
     
     
     void OnTriggerExit (Collider other)
     {
         // If the leaving gameobject is the player or an enemy and the collider is a capsule collider...
         if(other.gameObject == player || (other.gameObject.tag == DoneTags.enemy && other is CapsuleCollider))
             // decrease the count of triggering objects.
             count = Mathf.Max(0, count-1);
     }
     
     
     void Update ()
     {
         // Set the open parameter.
         anim.SetBool(hash.openBool,count > 0);
         
         // If the door is opening or closing...
         if(anim.IsInTransition(0) && !audio.isPlaying)
         {
             // ... play the door swish audio clip.
             audio.clip = doorSwishClip;
             audio.Play();
         }
     }
 }