Laravel標準ログインのコマンドは下記外部サイトを参照
https://qiita.com/mikaku/items/038e7c6180acd06b885d

shop_administratosテーブルマイグレーションファイル

<?php

use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class CreateShopAdministrators extends Migration
{
    const TABLE = 'shop_administrators';

    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        if (Schema::hasTable(self::TABLE)) {
            return;
        }

        Schema::create(self::TABLE, function (Blueprint $table) {
            $table->bigIncrements('id');
            $table->bigInteger('shop_id')->unsigned();
            $table->string('mail_address')->comment('メールアドレス');
            $table->string('password')->comment('パスワード');
            $table->timestamps();
            $table->foreign('shop_id')
                ->references('id')
                ->on('shops')
                ->onDelete('cascade');
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists(self::TABLE);
    }
}

SAMPLE/LoginController.php

<?php

namespace App\Http\Controllers\SAMPLE;

use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use Illuminate\Foundation\Auth\AuthenticatesUsers;

class LoginController extends Controller
{
    /*
    |--------------------------------------------------------------------------
    | Login Controller
    |--------------------------------------------------------------------------
    |
    | This controller handles authenticating users for the application and
    | redirecting them to your home screen. The controller uses a trait
    | to conveniently provide its functionality to your applications.
    |
    */
    use AuthenticatesUsers;

    /**
     * ログインロック仕様
     *
     * 試行回数 3回
     * ロック時間 3分
     */
    protected $maxAttempts = 3;
    protected $decayMinutes = 3;

    /**
     * Create a new controller instance.
     *
     * @return void
     */
    public function __construct() {
        $this->middleware('guest-shop')->except('logout');
    }

    /**
     * Get the login username to be used by the controller.
     *
     * @return string
     */
    public function username()
    {
        return 'mail_address';
    }

    protected function guard()
    {
        return Auth::guard('shop');
    }

    protected function validateLogin(Request $request)
    {
        $this->validate($request, [
            $this->username() => 'required|string',
            'password' => 'required|string'
        ]);
    }

    protected function credentials(Request $request)
    {
        return $request->only($this->username(), 'password');
    }

    /**
     * Show the application's login form.
     *
     * @return \Illuminate\Http\Response
     */
    public function showLoginForm()
    {
        return view('SAMPLE.login.index');
    }

    /**
     * @override
     */
    protected function sendLoginResponse(Request $request)
    {
        $request->session()->regenerate();

        $this->clearLoginAttempts($request);
        return $this->authenticated($request, $this->guard()->user());
    }

    /**
     * @override
     */
    protected function authenticated(Request $request, $user)
    {
        unset($user['password']);
        $user->last_authenticated_at = \Carbon\Carbon::now();
        $user->save();

        return $user;
    }

    /**
     * @override
     */
    public function logout(Request $request)
    {
        $this->guard()->logout();
        $request->session()->invalidate();

        return redirect('/console/shop/');
    }
}

App\Entities\ShopAdministrator

<?php

namespace App\Entities;

use Illuminate\Database\Eloquent\Model;
use Prettus\Repository\Contracts\Transformable;
use Prettus\Repository\Traits\TransformableTrait;
use Illuminate\Contracts\Auth\Authenticatable;
use Illuminate\Auth\Authenticatable as AuthenticableTrait;

class ShopAdministrator extends Model implements Transformable, Authenticatable
{
    use TransformableTrait, AuthenticableTrait;

    protected $table = 'shop_administrators';

    protected $guarded = [
        'id'
    ];

    public function getRememberTokenName()
    {
        return null; // not supported
    }

    /**
     * sessionに認証情報を持つためremember_tokenを利用していないが、
     * logout時にフレームワークの仕様上、必ず更新がかかる。
     * そのためremember_tokenのキーを除外することで回避する。
     * @see https://stackoverflow.com/questions/43467328/laravel-5-authentication-without-remember-token
     * @see https://laravel.io/forum/05-21-2014-how-to-disable-remember-token
     * @param string $key
     * @param mixed $value
     * @return $this|void
     */
    public function setAttribute($key, $value)
    {
        $is_remember_token_attribute = $key == $this->getRememberTokenName();
        if (!$is_remember_token_attribute) {
            parent::setAttribute($key, $value);
        }
    }

    public function shop()
    {
        return $this->belongsTo('App\Entities\Shop');
    }
}

config/auth.php

<?php

return [

    /*
    |--------------------------------------------------------------------------
    | Authentication Defaults
    |--------------------------------------------------------------------------
    |
    | This option controls the default authentication "guard" and password
    | reset options for your application. You may change these defaults
    | as required, but they're a perfect start for most applications.
    |
    */

    'defaults' => [
        'guard' => 'web',
        'passwords' => 'users',
    ],

    /*
    |--------------------------------------------------------------------------
    | Authentication Guards
    |--------------------------------------------------------------------------
    |
    | Next, you may define every authentication guard for your application.
    | Of course, a great default configuration has been defined for you
    | here which uses session storage and the Eloquent user provider.
    |
    | All authentication drivers have a user provider. This defines how the
    | users are actually retrieved out of your database or other storage
    | mechanisms used by this application to persist your user's data.
    |
    | Supported: "session", "token"
    |
    */

    'guards' => [
        'excm' => [
            'driver' => 'session',
            'provider' => 'shop_administrators',
        ],
        'api' => [
            'driver' => 'token',
            'provider' => 'users',
        ],
        'web' => [
            'driver' => 'session',
            'provider' => 'users',
        ],
    ],

    /*
    |--------------------------------------------------------------------------
    | User Providers
    |--------------------------------------------------------------------------
    |
    | All authentication drivers have a user provider. This defines how the
    | users are actually retrieved out of your database or other storage
    | mechanisms used by this application to persist your user's data.
    |
    | If you have multiple user tables or models you may configure multiple
    | sources which represent each model / table. These sources may then
    | be assigned to any extra authentication guards you have defined.
    |
    | Supported: "database", "eloquent"
    |
    */

    'providers' => [
        'users' => [
            'driver' => 'eloquent',
            'model' => App\User::class,
        ],
        'shop_administrators' => [
            'driver' => 'eloquent',
            'model' => App\Entities\ShopAdministrator::class,
        ],

    /*
    |--------------------------------------------------------------------------
    | Resetting Passwords
    |--------------------------------------------------------------------------
    |
    | You may specify multiple password reset configurations if you have more
    | than one user table or model in the application and you want to have
    | separate password reset settings based on the specific user types.
    |
    | The expire time is the number of minutes that the reset token should be
    | considered valid. This security feature keeps tokens short-lived so
    | they have less time to be guessed. You may change this as needed.
    |
    */

    'passwords' => [
        'users' => [
            'provider' => 'users',
            'table' => 'password_resets',
            'expire' => 60,
        ],
    ],

];

app/Http/Kernel.php

<?php

namespace App\Http;

use Illuminate\Foundation\Http\Kernel as HttpKernel;
use App\Http\Middleware\UA\SetLocale;
use App\Http\Middleware\UA\ResponseJsonFormatter;

class Kernel extends HttpKernel
{
    ・・・
    /**
     * The application's route middleware.
     *
     * These middleware may be assigned to groups or used individually.
     *
     * @var array
     */
    protected $routeMiddleware = [
        'auth' => \Illuminate\Auth\Middleware\Authenticate::class,
        'service-auth' => \App\Http\Middleware\ServiceAuthenticate::class,
        'auth.basic' => \Illuminate\Auth\Middleware\AuthenticateWithBasicAuth::class,
        'bindings' => \Illuminate\Routing\Middleware\SubstituteBindings::class,
        'cache.headers' => \Illuminate\Http\Middleware\SetCacheHeaders::class,
        'can' => \Illuminate\Auth\Middleware\Authorize::class,
        'guest' => \App\Http\Middleware\RedirectIfAuthenticated::class,
        'guest-excm' => \App\Http\Middleware\RedirectShopAuthenticated::class, ←●追加

        ・・・

    ];
}

ログイン後のホーム画面へのリダイレクト先定義

<?php

namespace App\Http\Middleware;

use Closure;
use Illuminate\Support\Facades\Auth;

class RedirectShopAuthenticated
{
    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @param  string|null  $guard
     * @return mixed
     */
    public function handle($request, Closure $next, $guard = null)
    {
        if (Auth::guard($guard)->check()) {
            return redirect('/shop/shop-home');
        }

        return $next($request);
    }
}

/shop/shop-homeがログイン後のhomeとなる

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