注册之后登录显示邮箱和密码不匹配

Laravel 5.8

web.php

Route::get('login', 'SessionsController@create')->name('login');
Route::post('login', 'SessionsController@store')->name('login');
Route::delete('logout', 'SessionsController@destroy')->name('logout');

sessions\create.blade.php

@extends('layouts.default')
@section('title', '登录')

@section('content')
  <div class="offset-md-2 col-md-8">
    <div class="card ">
      <div class="card-header">
        <h5>登录</h5>
      </div>
      <div class="card-body">
        @include('shared._errors')

        <form method="POST" action="{{ route('login') }}">
          {{ csrf_field() }}

          <div class="form-group">
            <label for="email">邮箱：</label>
            <input type="text" name="email" class="form-control" value="{{ old('email') }}">
          </div>

          <div class="form-group">
            <label for="password">密码：</label>
            <input type="password" name="password" class="form-control" value="{{ old('password') }}">
          </div>

          <button type="submit" class="btn btn-primary">登录</button>
        </form>

        <hr>

        <p>还没账号？<a href="{{ route('signup') }}">现在注册！</a></p>
      </div>
    </div>
  </div>
@stop

SessionsController.php

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;

class SessionsController extends Controller
{
    public function create()
    {
        return view('sessions.create');
    }

    public function store(Request $request)
    {
        $credentials = $this->validate($request, [
            'email' => 'required|email|max:255',
            'password' => 'required'
        ]);

        if (Auth::attempt($credentials)) {
            session()->flash('success', '欢迎回来！');
            return redirect()->route('users.show', [Auth::user()]);
        } else {
            session()->flash('danger', '很抱歉，您的邮箱和密码不匹配');
            return redirect()->back()->withInput();
        }
    }
}