Google MyBusiness API PHP Locations

its my first Google MyBusiness API encounter. Im trying to retrieve account locations but ive got nothing.

I dont have direct access for account, my client gave me access to API by json file.

$client = new Google_Client();
$client->useApplicationDefaultCredentials();
$client->addScope('https://www.googleapis.com/auth/plus.business.manage');

$service = new Google_Service_MyBusiness($client);
$accounts = $service->accounts->listAccounts();

and i don't have any error, just Google_Service_MyBusiness_ListAccountsResponse object, then giving foreach on that object and I can get account informations:

object(Google_Service_MyBusiness_Account)[94]
  protected 'internal_gapi_mappings' => 
    array (size=0)
      empty
  public 'accountName' => null
  public 'accountNumber' => null
  public 'name' => string 'accounts/XXXXXXXXXXXXXXXXXXXXX' (length=30)
  protected 'organizationInfoType' => string 'Google_Service_MyBusiness_OrganizationInfo' (length=42)
  protected 'organizationInfoDataType' => string '' (length=0)
  public 'permissionLevel' => null
  public 'profilePhotoUrl' => string '.../photo.jpg' (length=94)
  public 'role' => null
  protected 'stateType' => string 'Google_Service_MyBusiness_AccountState' (length=38)
  protected 'stateDataType' => string '' (length=0)
  public 'type' => string 'PERSONAL' (length=8)
  protected 'modelData' => 
    array (size=0)
      empty
  protected 'processed' => 
    array (size=0)
      empty
  public 'state' => 
    object(Google_Service_MyBusiness_AccountState)[84]
      protected 'internal_gapi_mappings' => 
        array (size=0)
          empty
      public 'status' => string 'UNVERIFIED' (length=10)
      protected 'modelData' => 
        array (size=0)
          empty
      protected 'processed' => 
        array (size=0)
          empty

Now when i try:

$name = $account->getName(); //accounts/XXXXXXXXXXXXXXXXXXXXX
$service->accounts_locations->listAccountsLocations($name);

i get almost empty Google_Service_MyBusiness_ListLocationsResponse object:

object(Google_Service_MyBusiness_ListLocationsResponse)[88]
  protected 'collection_key' => string 'locations' (length=9)
  protected 'internal_gapi_mappings' => 
    array (size=0)
      empty
  protected 'locationsType' => string 'Google_Service_MyBusiness_Location' (length=34)
  protected 'locationsDataType' => string 'array' (length=5)
  public 'nextPageToken' => null
  public 'totalSize' => null
  protected 'modelData' => 
    array (size=0)
      empty
  protected 'processed' => 
    array (size=0)
      empty

What is wrong? Am I doing something wrong, or i have wrong credentials(?). How can I check/ask client that he gave me correct access. Can he check Account name in his panel or something?

from Google MyBusiness API PHP Locations