Getting OAUTH_TOKEN_INVALID in a very simple Google Adwords PHP application

Question

I tried to create a very simple test on top of the Google Adwords PHP library to create AdWordsUser and access campaign services.

I have an approved developer token, I got client_id and client_secret from the Google Cloud Console, I also got access_token and user_token .

I added all this data to my auth.ini file, but my application does not work with this error:

 Fatal error: Uncaught SoapFault exception: [soap:Server] [AuthenticationError.OAUTH_TOKEN_INVALID @ ; trigger:''] in /home/kaosmic/www/adwords/src/Google/Api/Ads/Common/Lib/AdsSoapClient.php:216 Stack trace: #0 /home/kaosmic/www/adwords/src/Google/Api/Ads/Common/Lib/AdsSoapClient.php(216): SoapClient->__soapCall('get', Array, NULL, Array, Array) #1 /home/kaosmic/www/adwords/src/Google/Api/Ads/AdWords/v201309/CampaignService.php(6208): AdsSoapClient->__soapCall('get', Array) #2 /home/kaosmic/www/adwords/tests/AdWordsIntegrationTest.php(77): CampaignService->get(Object(Selector)) #3 /home/kaosmic/www/adwords/tests/test.php(12): AdWordsIntegrationTest->testIntegrationCheckUserAgent() #4 {main} thrown in /home/kaosmic/www/adwords/src/Google/Api/Ads/Common/Lib/AdsSoapClient.php on line 216 

I thought the token might have expired, so I restored them, but that didn't help. Do you have any ideas?

Thanks Anka