Change icon of Twitter

Hi, it’s my first time here.
I need help with this amazing plugin.

I have a blog, and I have 3 authors who write for my blog.

In the box under the post, it can only show the icon of the dafualt wordpress social network in the user profile (facebook, linkedin, twitter).

I would change the icon of Twitter and replace it with Instagram icon, or, if it’s possible to add the Instagram icon, in order to have all the default icon + instagram.

I try to add a custom field adding this code in the function.php

add_filter('user_contactmethods', 'my_user_contactmethods');
              
function my_user_contactmethods($user_contactmethods){
 
  $user_contactmethods['instagram'] = 'Instagram';
 
  return $user_contactmethods;
}

I correctly add a field in the profile user called “Instagram”, but obviusly it can’t appear in the Author’s Box.

Can someone help me?

for my purpose twitter is not needed, so I am indifferent between replacing the twitter icon or creating the instagram icon

Hope you could help me
Thank you very much

The page I need help with: [log in to see the link]