Gender based user avatar

I managed to come up with the answer 😀 Thanks to @Jos

function ht1_change_avatar($args, $id_or_email) {
    $gender = get_user_meta($id_or_email, 'user_gender', true);
    if($gender=='Male'){
        $myavatar="http://localhost:81/matrimony/wp-content/uploads/2020/04/groom.png";
    }else{
        $myavatar="http://localhost:81/matrimony/wp-content/uploads/2020/04/bride.png";
    }
    $args['url'] = $myavatar;
    return $args;
}
add_filter('get_avatar_data', 'ht1_change_avatar', 100, 2);