when we executing php examples/AdWords/v201809/BasicOperations/GetCampaigns.php on the terminal, Then getting an error
[2019-05-17 11:55:54] AW_SOAP.WARNING: clientCustomerId=123-108-6105 operations=1 service=CampaignService method=get responseTime=148 requestId=0005890f7465be7e0a62014cf401f9ca server=
adwords.google.com isFault=1 faultMessage=[QuotaCheckError.DEVELOPER_TOKEN_NOT_APPROVED @ ; trigger:'<null>']
[2019-05-17 11:55:54] AW_SOAP.NOTICE: POST /api/adwords/cm/v201809/CampaignService?wsdl HTTP/1.1
Connection: close
Content-Type: text/xml; charset=utf-8
SOAPAction: ""
Content-Length: 946
Authorization: REDACTED
<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="
http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns1="
https://adwords.google.com/api/adwords/cm/v201809"><SOAP-ENV:Header><ns1:RequestHeader><ns1:clientCustomerId>123-108-6105</ns1:clientCustomerId><ns1:developerToken>REDACTED</ns1:developerToken><ns1:userAgent>unknown (AwApi-PHP, googleads-php-lib/41.0.0, PHP/7.3.5-1+ubuntu18.04.1+
deb.sury.org+1)</ns1:userAgent><ns1:validateOnly>false</ns1:validateOnly><ns1:partialFailure>false</ns1:partialFailure></ns1:RequestHeader></SOAP-ENV:Header><SOAP-ENV:Body><ns1:get><ns1:serviceSelector><ns1:fields>Id</ns1:fields><ns1:fields>Name</ns1:fields><ns1:ordering><ns1:field>Name</ns1:field><ns1:sortOrder>ASCENDING</ns1:sortOrder></ns1:ordering><ns1:paging><ns1:startIndex>0</ns1:startIndex><ns1:numberResults>500</ns1:numberResults></ns1:paging></ns1:serviceSelector></ns1:get></SOAP-ENV:Body></SOAP-ENV:Envelope>
HTTP/1.1 500 Internal Server Error
Content-Type: text/xml; charset=UTF-8
Date: Fri, 17 May 2019 06:25:54 GMT
Expires: Fri, 17 May 2019 06:25:54 GMT
Cache-Control: private, max-age=0
X-Content-Type-Options: nosniff
X-Frame-Options: SAMEORIGIN
X-XSS-Protection: 1; mode=block
Server: GSE
Alt-Svc: quic=":443"; ma=2592000; v="46,44,43,39"
Accept-Ranges: none
Vary: Accept-Encoding
Connection: close
<soap:Envelope xmlns:soap="
http://schemas.xmlsoap.org/soap/envelope/"><soap:Header><ResponseHeader xmlns="
https://adwords.google.com/api/adwords/cm/v201809"><requestId>0005890f7465be7e0a62014cf401f9ca</requestId><serviceName>CampaignService</serviceName><methodName>get</methodName><operations>1</operations><responseTime>148</responseTime></ResponseHeader></soap:Header><soap:Body><soap:Fault><faultcode>soap:Client</faultcode><faultstring>[QuotaCheckError.DEVELOPER_TOKEN_NOT_APPROVED @ ; trigger:'<null>']</faultstring><detail><ApiExceptionFault xmlns="
https://adwords.google.com/api/adwords/cm/v201809"><message>[QuotaCheckError.DEVELOPER_TOKEN_NOT_APPROVED @ ; trigger:'<null>']</message><ApplicationException.Type>ApiException</ApplicationException.Type><errors xmlns:xsi="
http://www.w3.org/2001/XMLSchema-instance" xsi:type="QuotaCheckError"><fieldPath></fieldPath><trigger><null></trigger><errorString>QuotaCheckError.DEVELOPER_TOKEN_NOT_APPROVED</errorString><ApiError.Type>QuotaCheckError</ApiError.Type><reason>DEVELOPER_TOKEN_NOT_APPROVED</reason></errors></ApiExceptionFault></detail></soap:Fault></soap:Body></soap:Envelope>
PHP Fatal error: Uncaught Google\AdsApi\AdWords\v201809\cm\ApiException: [QuotaCheckError.DEVELOPER_TOKEN_NOT_APPROVED @ ; trigger:'<null>'] in /home/buzzyears/Downloads/googleads-php-lib/src/Google/AdsApi/Common/Util/Reflection.php:43
Stack trace:
#0 /home/buzzyears/Downloads/googleads-php-lib/src/Google/AdsApi/Common/Util/Reflection.php(43): ReflectionClass->newInstanceArgs(Array)
#1 /home/buzzyears/Downloads/googleads-php-lib/src/Google/AdsApi/Common/AdsSoapClient.php(202): Google\AdsApi\Common\Util\Reflection->createInstance('Google\\AdsApi\\A...', Array)
#2 /home/buzzyears/Downloads/googleads-php-lib/src/Google/AdsApi/Common/AdsSoapClient.php(164): Google\AdsApi\Common\AdsSoapClient->parseApiExceptionFromSoapFault(Object(SoapFault))
#3 /home/buzzyears/Downloads/googleads-php-lib/src/Google/AdsApi/AdWords/v201809/cm/CampaignService.php(164): Google\AdsApi\Common\AdsSoapClient->__soapCall('get', Array)
#4 /home/buzzyears/Downloads/googleads-php-lib/examples/AdWords/v201809/BasicOperations/GetCampaigns.php(55): Google\AdsAp in /home/buzzyears/Downloads/googleads-php-lib/src/Google/AdsApi/Common/Util/Reflection.php on line 43
Please suggest the solution and how can we approved developer access token.