I have to add button only specific user account page

I am trying to add button only on specific user account page where he/she can access another page when clicking on this button..But i cant done it.I am using visualCompany theme i added this code in themes function.php file for displaying msg only on specific user when he/she logged in but the code is not working..code is as follows,

function custom_user_account_content() {
$user = get_user_by(’email’, ‘[email protected]’); // Get the user object by email
if ($user && $user->ID == get_current_user_id()) {
// Display custom content for the user with the specified email
echo ‘This is a special message for user [email protected].’;
}
}
add_action(‘um_account_page_default’, ‘custom_user_account_content’);
Please help me how i can done this..

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