In Editor add animation clips to animator controller via code

How would I add animation clips to animator controller via code in the editor? Please note I Do not need to do this at runtime. I’m trying to automate this task so I don’t have to do it over 100 times.

Looks like I solved it this round:

using UnityEngine;
using UnityEngine.UI;
using System;
using System.Collections;
using System.Collections.Generic;
//MOST IMPORTANTLY USE
using UnityEditor.Animations;


    public class Test : MonoBehaviour
    {
#if UNITY_EDITOR
        public AnimatorController animationController;
        public AnimationClip animationClip;

        [ContextMenu("Run Test")]
        public void Run()
        {
            Motion motion = (Motion)animationClip as Motion;
            animationController.AddMotion(motion);
        }
#endif
    }