//redirect
public function socialLogin()
    {
        return Socialite::driver('facebook')->redirect();
    }

//callback
public function handleProviderCallback()
    {
    
        try {

            $user = Socialite::driver('facebook')->user();

            $finduser = User::where('facebook_id', $user->id)->first();

            if($finduser){

                Auth::login($finduser);

                return redirect()->intended('/');

            }else{
                $newUser = User::create([
                    'name' => $user->name,
                    'email' => $user->email,
                    'facebook_id'=> $user->id,
                    'password' => encrypt('Test123456')
                ]);

                Auth::login($newUser);

                return redirect()->intended('/');
            }

        } catch (Exception $e) {
            dd($e->getMessage());
        }

    }
    
    
    
    //routes
Route::get('/login/facebook',[login::class,'socialLogin'])->name('redirectToFacebook');
Route::get('/login/facebook/callback',[login::class,'handleProviderCallback'])->name('callbackFacebook');

// config/services.php
'facebook' => [
        'client_id' => '', //Facebook API
        'client_secret' => '', //Facebook Secret
        'redirect' => '',//callback url
     ],
    
    //config/app.php
    
    
     'Socialite' => Laravel\Socialite\Facades\Socialite::class,  //aliases
             Laravel\Socialite\SocialiteServiceProvider::class,  //providers