VerifyApikey policy did not populate variable verifyapikey.VerifyAPIKey.client_secret

[pengdu30]

Trying to do a test using basic auth to access Apigee Edge API Proxy and found after successfully verify api key the variable verifyapikey.VerifyAPIKey.client_secret value is blank. Here is the policy I'm using in PreFlow:

<Step>

<Name>verify-api-key</Name>

</Step>

According to following link after VerifyApiKey policy executed successfully the variable verifyapikey.VerifyAPIKey.client_secret value is blank when I using trace:

https://community.apigee.com/questions/19248/can-you-validate-client-key-and-secret-without-gen.html

Any suggestions? Thanks.