how to post form data through guzzle in api

I created an API for login in laravel. In postman it is working properly. Now I want to use that api from my web form. I have an login form and fill email and password then click on button then my login api should be run and should be redirect on dashboard.

For this I am using GUZZLE.

API is (in, routes/api.php):

Route::post('login', 'apifolder\AuthController@login');

login method in AuthCOntroller is:

public function login(Request $request)
    {
        $request->validate([
            'email' => 'required|string|email',
            'password' => 'required|string',
            'remember_me' => 'boolean'
        ]);

        $credentials = request(['email', 'password']);
        if(!Auth::attempt($credentials))
            return response()->json([
                'message' => 'Unauthorized'
            ], 401);

        $user = $request->user();
        
        $tokenResult = $user->createToken('Personal Access Token');
        $token = $tokenResult->token;
        if ($request->remember_me)
            $token->expires_at = Carbon::now()->addWeeks(1);
        $token->save();
        return response()->json([
            'access_token' => $tokenResult->accessToken,
            'token_type' => 'Bearer',
            'expires_at' => Carbon::parse(
                $tokenResult->token->expires_at
            )->toDateTimeString()
        ]);
    }

Above API is working properly in postman.

Now I want to use it from my web form.

routes are(in, routes/web.php):

Route::get('/','loginController@index')->name('login');
Route::POST('/login','loginController@login_submit')->name('login.submit');

controller is:

    public function login_submit(Request $request)
    {
    	$client = new \GuzzleHttp\Client();
    	 $url = "http://127.0.0.1:8000/api/auth/login";
    	
    	 $body['form_param'] = array('email'=>$request->email,'password'=>$request->password);
    	 $request = $client->post($url,$body);
    	 $response = $request->send();
    	
    	 dd($response);
    }

login blade is:

 <form action="{{ route('login.submit') }}" method="post">
        @csrf
        <div class="input-group mb-3">
          <input type="email" class="form-control" name="email" placeholder="Email">
          <div class="input-group-append">
            <div class="input-group-text">
              <span class="fas fa-envelope"></span>
            </div>
          </div>
        </div>
        <div class="input-group mb-3">
          <input type="password" class="form-control" name="password" placeholder="Password">
          <div class="input-group-append">
            <div class="input-group-text">
              <span class="fas fa-lock"></span>
            </div>
          </div>
        </div>
        <div class="row">
          <!-- /.col -->
          <div class="col-4">
            <button type="submit" class="btn btn-primary btn-block">Sign In</button>
          </div>
          <!-- /.col -->
        </div>
      </form>

But not working.