Laravel Social Auth

// Database Structure

public function up()
    {
        Schema::create('users', function (Blueprint $table) {
            $table->increments('id');
            $table->string('name');
            $table->string('email')->nullable();
            $table->string('password', 60)->nullable();
            $table->string('provider');
            $table->string('provider_id');
            $table->rememberToken();
            $table->timestamps();
        });
    }
		
		
	// Update your fillable property
	
	protected $fillable = [
        'name', 'email', 'password', 'provider', 'provider_id'
    ];
	
	

	// Open your config/services.php AND add any 
	
	'facebook' => [
        'client_id'     => env('FACEBOOK_ID'),
        'client_secret' => env('FACEBOOK_SECRET'),
        'redirect'      => env('FACEBOOK_URL'),
    ],
    
    	
	'twitter' => [
        'client_id'     => env('TWITTER_ID'),
        'client_secret' => env('TWITTER_SECRET'),
        'redirect'      => env('TWITTER_URL'),
    ],
    
        	
	'google' => [
        'client_id'     => env('GOOGLE_ID'),
        'client_secret' => env('GOOGLE_SECRET'),
        'redirect'      => env('GOOGLE_URL'),
    ],
    
    
    
    // Add the Keys to .env
        // for facebook
	FACEBOOK_ID=API_Key 
	FACEBOOK_SECRET=API_secret
	FACEBOOK_URL=callbackurl

    	// for twitter
	TWITTER_ID=API_Key 
	TWITTER_SECRET=API_secret
	TWITTER_URL=callbackurl
	
	
    	// for google
	GOOGLE_ID=API_Key 
	GOOGLE_SECRET=API_secret
	GOOGLE_URL=callbackurl
	
	
	// add the routes app/Http/routes.php
	
	Route::get('auth/{provider}', 'Auth\AuthController@redirectToProvider');
	Route::get('auth/{provider}/callback', 'Auth\AuthController@handleProviderCallback');
	
	
	// update your auth controller app/Http/Controllers/Auth/AuthController.php
	
	    public function redirectToProvider($provider)
		    {
			return Socialite::driver($provider)->redirect();
		    }

	    public function handleProviderCallback($provider)
		    {
			$user = Socialite::driver($provider)
						->stateless()
                        			->user();

			$authUser = $this->findOrCreateUser($user, $provider);
			Auth::login($authUser, true);
			return redirect($this->redirectTo);
		    }
		    
		    
	    public function findOrCreateUser($user, $provider)
		    {
			$authUser = User::where('provider_id', $user->id)->first();
			if ($authUser) {
			    return $authUser;
			}
			return User::create([
			    'name'     => $user->name,
			    'email'    => $user->email,
			    'provider' => $provider,
			    'provider_id' => $user->id
			]);
		    }
		    
		    
	// Lastly, the links
	
	
	    <a href="{{ url('/auth/facebook') }}" class="btn btn-primary">Facebook Login</a>
            <a href="{{ url('/auth/twitter') }}" class="btn btn-primary">Twitter Login</a>
            <a href="{{ url('/auth/google') }}" class="btn btn-primary">Google Login</a>