Void verifyCertificate(TLSsession session, String hostname="")
session: An open TLS session
hostname: The hostname of the server connected to. This may be left blank, in which case only the validity of the certificate will be checked. It is much more secure to specify a hostname, so that it can be confirmed that the host connected to is the expected one.
Verify that the server connected to has a valid server certificate. This should be called before sending or receiving confidential data on the connection.