Custom Function (functions.php)

Hello,
I require a login to my site. I am using the Mantra theme. When a user logs in, they are taken to the control panel, but I want them to go to the site home page.
Any suggestions?

I found this one (code at bottom), which will work, but it requires editing the functions.php file. It detects user permissions and redirects based on this.

Can I do this, and will it be overwritten as I upgrade Mantra in the future?

A better way? or custom function capability?

https://www.brookfieldbrewers.org/

<em>
/**
* Redirect back to homepage and not allow access to
* WP admin for Subscribers.
*/
function themeblvd_redirect_admin(){
if ( ! current_user_can( ‘edit_posts’ ) ){
wp_redirect( site_url() );
exit;
}
}
add_action( ‘admin_init’, ‘themeblvd_redirect_admin’ );