Getting Error RPM package is not signed while installing Edge Private Cloud

While installing Apigee components for private cloud using “tar” file, it fails with following error

Error : Package apigee-repo.rpm is not signed 

Where can we find GPG keys which can be imported before installing different Apigee components ?

The error is seen because of some strict checks enabled. The only way to workaround this would be to disable the gpgcheck. It can be disabled by adding gpgcheck=0 to the repository configuration.