当前用户没有修改自己信息的权限？

UserPolicy.php

class UserPolicy
{
    use HandlesAuthorization;

//    /**
//     * Create a new policy instance.
//     *
//     * @return void
//     */
//    public function __construct()
//    {
//        //
//    }

    public function update(User $currentUser, User $user)
    {
        return $currentUser->id === $user->id;
    }
}

AuthServiceProvider.php

class AppServiceProvider extends ServiceProvider
{
//    /**
//     * Bootstrap any application services.
//     *
//     * @return void
//     */
//    public function boot()
//    {
//        //
//    }
//
//    /**
//     * Register any application services.
//     *
//     * @return void
//     */
//    public function register()
//    {
//        //
//    }

    /**
     * The policy mappings for the application.
     *
     * @var array
     */
    protected $policies=[
        'App\Model' => 'App\Policies\ModelPolicy',
        \App\Models\User::class => \App\Policies\UserPolicy::class,
    ];
}

UsersController.php

public function edit(User $user)
    {
        $this->authorize('update', $user);
        return view('users.edit',compact('user'));
    }

    public function update(user $user, Request $request)
    {

        $this->validate($request,[
            'name'=>'required|unique:users|max:50',
            'password'=>'nullable|confirmed|min:6'

        ]);

        $this->authorize('update', $user);

        $data=[];
        $data['name']=$request->name;
        if ($request->password){
            $data['password']=bcrypt($request->password);
        }

        $user->update($data);
        session()->flash('success','更新成功');
        return redirect()->route('users.show', $user->id);
    }

问题是在edit()和update()加上$this->authorize('update', $user);后才发生的