Redirect a user on first login

add_filter( 'wpmem_login_redirect', 'my_first_login_redirect', 10, 2 );
function my_first_login_redirect( $redirect_to, $user_id ) {

    // Set page to redirect the user to.
    // @uses https://codex.wordpress.org/Function_Reference/home_url
    $redirect_url = home_url( 'my-page' );
    
    // See if the user has already logged in before
    // @uses https://codex.wordpress.org/Function_Reference/get_user_meta
    $first_login = get_user_meta( $user_id, 'first_login', true );
    if ( ! $first_login ) {
        // Sets that the user has done their first login
        // @uses https://codex.wordpress.org/Function_Reference/update_user_meta
        update_user_meta( $user_id, 'first_login', 'true' );
        
        // Set redirect based on user's first login
        $redirect_to = $redirect_url;
    }
    
    return $redirect_to;
}