How to handle API response in controller

Hello, i'm working on eCommerce website 1- project backend and APIs 2- Client side [Frontend] project

1-this is the function in backend project ..

public function register(Request $request)
{
    $validator = Validator::make($request->all(), [
        'name' => 'required',
        'email' => 'required|email|unique:users',
        'password' => 'required',
        'mobile' => 'required|unique:users',
        'country_id' => 'required'
    ]);
    if ($validator->fails()) {
        return response()->json(['error'=>$validator->errors()], 401);
    }
    $input = $request->all();
    $input['password'] = bcrypt($input['password']);
    $user = User::create($input);
    $success['token'] =  $user->createToken('MyApp')-> accessToken;
    $success['name'] =  $user->name;
    return response()->json([
        'status' => 'success',
        'data' => $success,
    ], 200);    

}

2- and from client side this the function.

protected function register(Request $request)
{
    $response = \Curl::to('http://localhost/backend/public/api/v1/client-register')->withData(
        [
            'name'=> $request->name,
            'email'=> $request->email,
            'password'=> $request->password,
            'mobile'=>$request->mobile,
            'role_id'=>5,
            'country_id'=> $request->country_id
        ]
          )->post();
          $data = json_decode($response, true);
        // what i need here 
        /*check if(response success){
        / go to route('bla bla');
        }else{
            return back with msg 
            please help 
        }
    }

please i need help to access error or success message to redirect user correctly.