Laravel Error:

ChangePassword.php

<?php

namespace App\Notifications;

use Illuminate\Bus\Queueable;
use Illuminate\Notifications\Notification;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Notifications\Messages\MailMessage;

class ChangePassword extends Notification
{
    use Queueable;

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

    /**
     * Get the notification's delivery channels.
     *
     * @param  mixed  $notifiable
     * @return array
     */
    public function via($notifiable)
    {
        return ['database'];
    }
    /**
     * Get the array representation of the notification.
     *
     * @param  mixed  $notifiable
     * @return array
     */
    public function toArray($notifiable)
    {
        return [
            'message' => 'You changed your password.'
        ];
    }
}

controller.php

<?php 

/**
     * Update the account password.
     *
     * @url    POST: /profile/settings/password
     * @param  Requests\AccountPassword $input
     * @return \Illuminate\Http\RedirectResponse
     */
    public function StorePassword(Requests\AccountPassword $input)
    {
        $user = auth()->user();

        if (User::find($user->id)->update($input->except('_token'))) {
            $user->notify($user, new ChangePassword());
        }

        session()->flash('message', 'The account password has been updated');
        return redirect()->back();
    }

error.txt

Call to undefined method Illuminate\Database\Query\Builder::via()

in Builder.php line 2431
at Builder->__call('via', array(object(User)))
at call_user_func_array(array(object(Builder), 'via'), array(object(User))) in Builder.php line 1423
at Builder->__call('via', array(object(User)))
at call_user_func_array(array(object(Builder), 'via'), array(object(User))) in Model.php line 3513
at Model->__call('via', array(object(User))) in ChannelManager.php line 64
at ChannelManager->sendNow(array(object(User)), object(User)) in ChannelManager.php line 43
at ChannelManager->send(array(object(User)), object(User)) in RoutesNotifications.php line 18
at User->notify(object(User), object(ChangePassword)) in AccountController.php line 59
at AccountController->StorePassword(object(AccountPassword))
at call_user_func_array(array(object(AccountController), 'StorePassword'), array(object(AccountPassword))) in Controller.php line 52
at Controller->callAction('StorePassword', array(object(AccountPassword))) in ControllerDispatcher.php line 44
at ControllerDispatcher->dispatch(object(Route), object(AccountController), 'StorePassword') in Route.php line 189
at Route->runController() in Route.php line 144
at Route->run(object(Request)) in Router.php line 642
at Router->Illuminate\Routing\{closure}(object(Request)) in Pipeline.php line 53
at Pipeline->Illuminate\Routing\{closure}(object(Request)) in CreateFreshApiToken.php line 39
at CreateFreshApiToken->handle(object(Request), object(Closure)) in Pipeline.php line 137
at Pipeline->Illuminate\Pipeline\{closure}(object(Request)) in Pipeline.php line 33
at Pipeline->Illuminate\Routing\{closure}(object(Request)) in SubstituteBindings.php line 41
at SubstituteBindings->handle(object(Request), object(Closure)) in Pipeline.php line 137
at Pipeline->Illuminate\Pipeline\{closure}(object(Request)) in Pipeline.php line 33
at Pipeline->Illuminate\Routing\{closure}(object(Request)) in Authenticate.php line 43
at Authenticate->handle(object(Request), object(Closure)) in Pipeline.php line 137
at Pipeline->Illuminate\Pipeline\{closure}(object(Request)) in Pipeline.php line 33
at Pipeline->Illuminate\Routing\{closure}(object(Request)) in VerifyCsrfToken.php line 64
at VerifyCsrfToken->handle(object(Request), object(Closure)) in Pipeline.php line 137
at Pipeline->Illuminate\Pipeline\{closure}(object(Request)) in Pipeline.php line 33
at Pipeline->Illuminate\Routing\{closure}(object(Request)) in ShareErrorsFromSession.php line 49
at ShareErrorsFromSession->handle(object(Request), object(Closure)) in Pipeline.php line 137
at Pipeline->Illuminate\Pipeline\{closure}(object(Request)) in Pipeline.php line 33
at Pipeline->Illuminate\Routing\{closure}(object(Request)) in StartSession.php line 64
at StartSession->handle(object(Request), object(Closure)) in Pipeline.php line 137
at Pipeline->Illuminate\Pipeline\{closure}(object(Request)) in Pipeline.php line 33
at Pipeline->Illuminate\Routing\{closure}(object(Request)) in AddQueuedCookiesToResponse.php line 37
at AddQueuedCookiesToResponse->handle(object(Request), object(Closure)) in Pipeline.php line 137
at Pipeline->Illuminate\Pipeline\{closure}(object(Request)) in Pipeline.php line 33
at Pipeline->Illuminate\Routing\{closure}(object(Request)) in EncryptCookies.php line 59
at EncryptCookies->handle(object(Request), object(Closure)) in Pipeline.php line 137
at Pipeline->Illuminate\Pipeline\{closure}(object(Request)) in Pipeline.php line 33
at Pipeline->Illuminate\Routing\{closure}(object(Request)) in Pipeline.php line 104
at Pipeline->then(object(Closure)) in Router.php line 644
at Router->runRouteWithinStack(object(Route), object(Request)) in Router.php line 618
at Router->dispatchToRoute(object(Request)) in Router.php line 596
at Router->dispatch(object(Request)) in Kernel.php line 263
at Kernel->Illuminate\Foundation\Http\{closure}(object(Request)) in Pipeline.php line 53
at Pipeline->Illuminate\Routing\{closure}(object(Request)) in Debugbar.php line 49
at Debugbar->handle(object(Request), object(Closure)) in Pipeline.php line 137
at Pipeline->Illuminate\Pipeline\{closure}(object(Request)) in Pipeline.php line 33
at Pipeline->Illuminate\Routing\{closure}(object(Request)) in CheckForMaintenanceMode.php line 46
at CheckForMaintenanceMode->handle(object(Request), object(Closure)) in Pipeline.php line 137
at Pipeline->Illuminate\Pipeline\{closure}(object(Request)) in Pipeline.php line 33
at Pipeline->Illuminate\Routing\{closure}(object(Request)) in Pipeline.php line 104
at Pipeline->then(object(Closure)) in Kernel.php line 149
at Kernel->sendRequestThroughRouter(object(Request)) in Kernel.php line 116
at Kernel->handle(object(Request)) in index.php line 53
at require_once('/Users/tim/Documents/idev-git/IMA/public/index.php') in server.php line 21