ultimatemember

add_action('um_account_pre_update_profile', 'did_user_change_email', 10, 2 );
function did_user_change_email( $changes, $user_id ) {

	$data = get_userdata($user_id);
	if ( isset( $changes['user_email'] ) && $data->user_email != $changes['user_email'] ) {
		// user e-mail changed! Do something
	}

}

ultimatemember

/*

This is a sample filter that assumes your textfield meta key is "buttoncode"
The filter below allow you to change the output dynamically
to show a shortcode instead of the value entered for that field

Use in theme functions.php and do not have to rely on UM core

*/