使用 Laravel 10 在 Blade 中添加成功消息

我在控制器中添加了一条成功消息，但在数据库中插入数据后，没有显示成功消息.希望得到专家的帮助.

This is my HTML code:个

<form action="{{url('/')}}/register" method="post">
  @csrf
  <div class="fields">
    <div class="input-field">
      <label for="fn" id="Fn">First Name</label>
      <div class="inpt">
        <input type="text" id="fn" name="First_Name" placeholder="Enter Your First Name" />
      </div>
    </div>
  </div>
  <div class="input-field">
    <label for="ln" id="Ln">Last Name</label>
    <div class="inpt">
      <input type="text" id="ln" name="Last_Name" placeholder="Enter Your Last Name" />
    </div>
  </div>
  <div class="input-field">
    <label for="email">E-mail</label>
    <div class="inpt">
      <input type="text" id="email" name="email" placeholder="Enter Your Email" required />
    </div>
  </div>
</form>

This is my controller:个

Registrationform::create($request->all());

return redirect()->route('register')->withSuccess('You have registered successfully!');

This is my route:个

Route::get('/register', [Registrationcontroller::class,'register'])->name('register'); 
Route::post('/register', [Registrationcontroller::class,'store']);