Google Ads Api when using PageSize

I am trying to limit the number of returned keyword ideas. The code works fine, but when I try to set limit to the keywordIdeas that I get using 'pageSize' I get the following error:

An unexpected error occurred: { "message": "Resource has been exhausted (e.g. check quota).", "code": 8, "status": "RESOURCE_EXHAUSTED", "details": [ { "@type": "type.googleapis.com\/google.ads.googleads.v14.errors.GoogleAdsFailure", "errors": [ { "errorCode": { "quotaError": "RESOURCE_EXHAUSTED" }, "message": "Too many requests. Retry in 4 seconds.", "details": { "quotaErrorDetails": { "rateScope": "ACCOUNT", "rateName": "Requests per service per method", "retryDelay": "4s" } } } ], "requestId": "eTMFNxlHYYTzZGDT7Cksfw" } ] }

Which is odd, because I am trying to limit the results and without pageSize this is error is not displayed.

Here is the code:

namespace Google\Ads\GoogleAds\Examples\Planning; require __DIR__ . '/../../vendor/autoload.php'; use GetOpt\GetOpt; use Google\Ads\GoogleAds\Examples\Utils\ArgumentNames; use Google\Ads\GoogleAds\Examples\Utils\ArgumentParser; use Google\Ads\GoogleAds\Lib\OAuth2TokenBuilder; use Google\Ads\GoogleAds\Lib\V14\GoogleAdsClient; use Google\Ads\GoogleAds\Lib\V14\GoogleAdsClientBuilder; use Google\Ads\GoogleAds\Lib\V14\GoogleAdsException; use Google\Ads\GoogleAds\Util\V14\ResourceNames; use Google\Ads\GoogleAds\V14\Enums\KeywordPlanNetworkEnum\KeywordPlanNetwork; use Google\Ads\GoogleAds\V14\Errors\GoogleAdsError; use Google\Ads\GoogleAds\V14\Services\GenerateKeywordIdeaResult; use Google\Ads\GoogleAds\V14\Services\KeywordAndUrlSeed; use Google\Ads\GoogleAds\V14\Services\KeywordSeed; use Google\Ads\GoogleAds\V14\Services\UrlSeed; use Google\ApiCore\ApiException; function generateKeywordIdeas($customerId, $url, $language, $locationId){     try {         // Google Ads API Configurations        $config = [             'developerToken' => '***',             'clientId' => '***',             'clientSecret' => '***',             'refreshToken' => '***',             'loginCustomerId' => '***',              'useSandbox' => true, // Set to true if you want to use the sandbox environment for testing.             'useImplicitConversion' => false, // Set to true if you want to automatically convert currency and units.         ];                 $oAuth2Credential = (new OAuth2TokenBuilder())         ->fromFile($_SERVER['DOCUMENT_ROOT'] . '/google-ads-php/google_ads_php.ini')         ->build();         $googleAdsClient = (new GoogleAdsClientBuilder())         ->fromFile($_SERVER['DOCUMENT_ROOT'] . '/google-ads-php/google_ads_php.ini')         ->withOAuth2Credential($oAuth2Credential)         ->build();                  $pageUrl = null;         $keywords = ['marketing','seo','advertising'];                        $locationIds = [21167];         $geoTargetConstants =  array_map(function ($locationId) {             return ResourceNames::forGeoTargetConstant($locationId);         }, $locationIds);         $keywordPlanIdeaServiceClient = $googleAdsClient->getKeywordPlanIdeaServiceClient();               $requestOptionalArgs = [];         if (empty($keywords)) {             // Only page URL was specified, so use a UrlSeed.             $requestOptionalArgs['urlSeed'] = new UrlSeed(['url' => $pageUrl]);         } elseif (is_null($pageUrl)) {             // Only keywords were specified, so use a KeywordSeed.             $requestOptionalArgs['keywordSeed'] = new KeywordSeed(['keywords' => $keywords]);         } else {             // Both page URL and keywords were specified, so use a KeywordAndUrlSeed.             $requestOptionalArgs['keywordAndUrlSeed'] =                 new KeywordAndUrlSeed(['url' => $pageUrl, 'keywords' => $keywords]);         }         $response = $keywordPlanIdeaServiceClient->generateKeywordIdeas(             [                 // Set the language resource using the provided language ID.                 'language' => ResourceNames::forLanguageConstant(1000),                 'customerId' => ***,                 // Add the resource name of each location ID to the request.                 'geoTargetConstants' => $geoTargetConstants,                 'keywordPlanNetwork' => KeywordPlanNetwork::GOOGLE_SEARCH,                 'pageSize'=>50                            ]+$requestOptionalArgs         );         // Iterate over the results and print its detail.         foreach ($response->iterateAllElements() as $result) {         var_dump($result->getText());                 } catch (GoogleAdsException $e) {         printf(             "An error occurred while generating keyword ideas: %s\n",             $e->getMessage()         );     } catch (\Throwable $e) {         printf(             "An unexpected error occurred: %s\n",             $e->getMessage()         );     } } generateKeywordIdeas($customerId, $url, $language, $locationId); ?>