Create .png file from script, then import as asset

So I wrote this method for an editor script. It saves a Texture2D as a .png file, then tries to import the .png file as an asset. But I can't figure out how to import the newly created .png file. And yes, I'm saving the .png file in the assets folder. Any ideas?

 using System.IO;
 
 Texture2D SaveTexture(Texture2D texture, string filePath) {
         byte[] bytes = texture.EncodeToPNG();
         FileStream stream = new FileStream(filePath, FileMode.OpenOrCreate, FileAccess.Write);
         BinaryWriter writer = new BinaryWriter(stream);
         for (int i = 0; i < bytes.Length; i++) {
             writer.Write(bytes[i]);
         }
         writer.Close();
         stream.Close();
         DestroyImmediate(texture);

         //I can't figure out how to import the newly created .png file as a texture
         AssetDatabase.Refresh();
         Texture2D newTexture = (Texture2D)AssetDatabase.LoadAssetAtPath(filePath, typeof(Texture2D));
         if (newTexture == null) {
             Debug.Log("Couldn't Import");
         }
         else {
             Debug.Log("Import Successful");
         }
         return newTexture;
     }