cURL error 60 is going while using google auth api - development

cURL error 60 is going while using google auth api

GuzzleHttp Exception RequestException
cURL error 60: SSL certificate problem: unable to get local issuer certificate (see http://curl.haxx.se/libcurl/c/libcurl-errors.html)

i’m using google+ api and this error is not going even after adding cacert.php and modifying php.ini

curl.cainfo = “‪C:xamppphpextrassslcacert.pem”

xampp server
windows

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