How to Spawn an enemy behind player?

Hi sorry for bad english, if you play slender the eight pages you know what i want to do. I want to spawn enemy behind of player. When player looks back jumpscare happens. I wrote something like this, this is spawns enemy when press “F” at certain distance.

using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class EnemySpawner : MonoBehaviour
{
    //config params
    [SerializeField] GameObject EnemyPrefab;

    [SerializeField] Vector3 spawnDistance = new Vector3(50f,5f,0f);

    //params
    Vector3 PlayerPosition;

    enum states { first, second, third };

    states gameState = states.first;


    // Start is called before the first frame update
    void Start()
    {
        
    }

    // Update is called once per frame
    void Update()
    {
        if (Input.GetKeyDown(KeyCode.F)) 
        {
            Spawn();
        }
    }

    public void Spawn() 
    {
        DestroyAllOtherEnemies();

        Vector3 spawonpoint = getPlayerPosition().transform.position + spawnDistance;

        Instantiate(EnemyPrefab, spawonpoint, getPlayerPosition().transform.rotation);

    }

    private void DestroyAllOtherEnemies()
    {
        var enemies = GameObject.FindGameObjectsWithTag("Enemy");

        foreach(GameObject enemy in enemies) 
        {
            Destroy(enemy);
        }


    }

    private JumpscareController getPlayerPosition() 
    {
        return FindObjectOfType<JumpscareController>();
    }
}

It seems like you spawn the enemy at a position relative to the player position. You actually want to spawn the enemy behind the player, so line 40 should be something like:

 Vector3 spawonpoint = getPlayer().transform.TransformPoint(spawnDistance);

and the SpawnDistance should be something like:

Vector3 spawnDistance = new Vector3(0,5,-50);

This makes an enemy spawn 50 units behind your player and 5 up.