Adding javascript to header

For my first plugin, I’m trying to add a line of code into the head of the edit user profile page. I’m not able to get it to work:

<?php
/*
Plugin Name: user profile js
Plugin URI:
Description: Add javascript to edit user profile page
Author:
Version:
Author URI:
*/

function my_header_content(){
echo "<script>...</script>";}

add_action("edit_user_profile","my_header_content");

?>

Any help is appreciated