How to realize registration and login in ThinkPHP6 through Ucenter

<?php
declare (strict_types = 1);

namespace app\controller;

use Ucenter\Controller\UcController;
class uc extends UcController
{
    /**
     * 构造方法，用于实例化 UcController
     */
    public function __construct(){
        $this->init();
    }
}

                $username = $data['Content'];
                $result = $this->uc->uc_check_name($username);
                switch ($result) {
                    case -1:
                        $reason = "用户名不合法";
                        break;
                    case -2:
                        $reason = "包含不允许注册的词语";
                        break;
                    case -3:
                        $reason = "用户名已经存在";
                        break;
                }
                if ($result != 1) {
                    $this->_resetStep();
                    return array(join("\n", array_merge(array('【注册】注册失败', $reason), $this->_guestActions()
                    )),
                        'text');
                } else {
                    $this->_setStep(self::STEP_REGISTER_PASSWORD);
                    Session::set('username', $data['Content']);

                    return array('【注册】请输入密码', 'text');
                }
            }

            //注册->输入密码
            if ($this->_currentStep() == self::STEP_REGISTER_PASSWORD) {
                $this->_resetStep();
                Session::set('password', $data['Content']);
                //call ucenter to register user
                $username_valid = $this->uc->uc_check_name(Session::get('username'));
                Log::write('$username_valid' . $username_valid, 'debug');
                if ($username_valid == 1) {
                    //register
                    Log::write('start register ' . Session::get('username'), 'debug');
                    $email = "reg_" . substr(Session::getId(), 0, 3) . time() . substr(Session::getId(), 7, 4) .
                        "@null.null";
                    //$email = Session::get('username').'@'.Session::get('username').'.com';
                    $register_result = $this->uc->uc_register(Session::get('username'), Session::get('password'),
                        $email);
                    Log::write('register result is ' . $register_result, 'debug');
                    switch ($register_result) {
                        case -1:
                            $reason = "用户名不合法";
                            break;
                        case -2:
                            $reason = "包含不允许注册的词语";
                            break;
                        case -3:
                            $reason = "用户名已经存在";
                            break;
                        case -4:
                            $reason = "Email格式有误";
                            break;
                        case -5:
                            $reason = "Email不允许注册";
                            break;
                        case -6:
                            $reason = "该Email已经被注册";
                            break;
                    }
                    if ($register_result > 0) {
                        Log::write('Ucenter register successful' . Session::get('username'), 'debug');
                        return array(join("\n", array_merge(array('【注册】注册成功'), $this->_guestActions())), 'text');
                    } else {
                        Log::write('Ucenter register failed' . $reason, 'debug');
                        $this->_resetSession();
                        return array(join("\n", array_merge(array('【注册】注册失败', $reason), $this->_guestActions()
                        )),
                            'text');
                    }
                }

            }

$result = $this->uc->uc_login(Session::get('username'), $data['Content']);