Laravel login with username, email and mobile

2014_10_12_000000_create_users_table.php

<?php

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

class CreateUsersTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('users', function (Blueprint $table) {
            $table->bigIncrements('id');
            $table->string('name');
            $table->string('username')->unique();
            $table->string('mobile')->unique();
            $table->string('email')->unique();
            $table->timestamp('email_verified_at')->nullable();
            $table->string('password');
            $table->rememberToken();
            $table->timestamps();
        });
    }

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

login.blade.php

@extends('layouts.app')

@section('content')
<div class="container">
    <div class="row justify-content-center">
        <div class="col-md-8">
            <div class="card">
                <div class="card-header">{{ __('Login') }}</div>

                <div class="card-body">
                    <form method="POST" action="{{ route('login') }}">
                        @csrf

                        <div class="form-group row">
                            <label for="identity" class="col-md-4 col-form-label text-md-right">{{ __('E-Mail / Username / Mobile #') }}</label>

                            <div class="col-md-6">
                                <input id="identity" type="text" class="form-control{{ $errors->has('identity') ? ' is-invalid' : '' }}" name="identity" value="{{ old('identity') }}" required autofocus>

                                @if ($errors->has('identity'))
                                    <span class="invalid-feedback" role="alert">
                                        <strong>{{ $errors->first('identity') }}</strong>
                                    </span>
                                @endif
                            </div>
                        </div>

                        <div class="form-group row">
                            <label for="password" class="col-md-4 col-form-label text-md-right">{{ __('Password') }}</label>

                            <div class="col-md-6">
                                <input id="password" type="password" class="form-control{{ $errors->has('password') ? ' is-invalid' : '' }}" name="password" required>

                                @if ($errors->has('password'))
                                    <span class="invalid-feedback" role="alert">
                                        <strong>{{ $errors->first('password') }}</strong>
                                    </span>
                                @endif
                            </div>
                        </div>

                        <div class="form-group row">
                            <div class="col-md-6 offset-md-4">
                                <div class="form-check">
                                    <input class="form-check-input" type="checkbox" name="remember" id="remember" {{ old('remember') ? 'checked' : '' }}>

                                    <label class="form-check-label" for="remember">
                                        {{ __('Remember Me') }}
                                    </label>
                                </div>
                            </div>
                        </div>

                        <div class="form-group row mb-0">
                            <div class="col-md-8 offset-md-4">
                                <button type="submit" class="btn btn-primary">
                                    {{ __('Login') }}
                                </button>

                                @if (Route::has('password.request'))
                                    <a class="btn btn-link" href="{{ route('password.request') }}">
                                        {{ __('Forgot Your Password?') }}
                                    </a>
                                @endif
                            </div>
                        </div>
                    </form>
                </div>
            </div>
        </div>
    </div>
</div>
@endsection

LoginController.php

<?php

namespace App\Http\Controllers\Auth;

use Illuminate\Support\Str;
use Illuminate\Http\Request;
use App\Http\Controllers\Controller;
use Illuminate\Validation\ValidationException;
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;

    /**
     * Where to redirect users after login.
     *
     * @var string
     */
    protected $redirectTo = '/home';

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

    /**
     * Get the login username to be used by the controller.
     *
     * @return string
     */
    public function username()
    {
        $field = $this->guessField(
            $identity = request('identity')
        );

        request()->merge([$field => $identity]);

        return $field;
    }

    /**
     * Guess the identity type.
     *
     * @param  $identity
     * @return string
     */
    protected function guessField($identity)
    {
        if (ctype_digit($identity))
            return 'mobile';

        return Str::contains($identity, '@') ? 'email' : 'username';
    }

    /**
     * Validate the user login request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return void
     *
     * @throws \Illuminate\Validation\ValidationException
     */
    protected function validateLogin(Request $request)
    {
        $this->validate(
            $request,
            [
                'identity' => 'required|string',
                'password' => 'required|string',
            ],
            [
                'identity.required' => 'Username or mobile # is required',
                'password.required' => 'Password is required',
            ]
        );
    }

    /**
     * Get the failed login response instance.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return \Symfony\Component\HttpFoundation\Response
     *
     * @throws \Illuminate\Validation\ValidationException
     */
    protected function sendFailedLoginResponse(Request $request)
    {
        throw ValidationException::withMessages([
            'identity' => [trans('auth.failed')],
        ]);
    }
}