Add link for CPT to another CPT on submit button

class oArenaAddTeam {
public function __construct() {
add_action (‘init’, [$this, ‘addTeamTournament’]);
}

function addTeamTournament()
{
    // add_action('add_meta_boxes', 'addTeamTournament');
    // $post = get_post_type();

    // echo 'you are here';
     $author_id = get_current_user_id();

    $args = array(
        'author' => $author_id,
        'post_type' => 'team',
        'order' => -1
    );

    $user = get_posts($args);
    // untill there i have the var dump ok with post author 
    // var_dump($user);
    // exit;
    if (isset($_POST['register-team-tournament'])) 
    {
        echo 'there';
        function init_metabox_tournament() 
        {
            add_meta_box('team_register_tournament', '', 'team_register_tournament', 'tournament', 'normal' );
        }   

        function team_tournament($post)
        {
            // var_dump($post);
            // die;
            $team_tournament = get_post_meta($post->ID, '_team_register_tournament', true);

        }

        add_action('save_post', 'save_metabox_tournament');

        function save_metabox_tournament($post_id)
        {
            if (isset($_POST['register-team-tournament'])) 
            {
                update_post_meta($post_id, '_team_register_tournament', $user->post_title);
            }
        }
    } else {
        echo 'wrong';
    }
} }




<form action="add-team" method="post">
<input type="submit" value="S'inscrire" name="register-team-tournament"">
</form>

Thanks in advance 😀