...

# 1 - Create a stub configuration.
$my_stub_config = new Com::Vmware::Vapi::Bindings::StubConfiguration();

# 2 - Create a SAML token security context.
my $context_factory = new Com::Vmware::Vapi::Dsig::SecurityContextFactory();
my $saml_token_context = $context_factory->create_saml_security_context(
                            'token'       => $my_saml_token,
                            'private_key' => $my_private_key);
# 3 - Apply the token security context to the stub configuration.
$my_stub_config->set_security_context(
                 security_context => $saml_token_context);

# 4 - Create a session stub, using the token security context.
my $protocol_factory =
     new Com::Vmware::Vapi::Protocol::ProtocolConnectionFactory();
$my_connection = $protocol_factory->get_connection(
                    'protocol_type' => 'https',
                    'uri'           => "$my_vapi_url/api");
$my_stub_factory =
     new Com::Vmware::Vapi::Bindings::StubFactory(
            'api_provider' => $my_connection->get_api_provider() );
$my_vapi_stub = $my_stub_factory->create_stub(
                   'service_name' => 'Com::Vmware::Cis::Session',
                   'stub_config'  => $my_stub_config);
# 5 - Use the create() operation to create an authenticated session.
my $session_id = $my_vapi_stub->create();

# 6 - Create a session security context and update the stub configuration
#     to use the session ID.
my $session_id_context = $context_factory->create_session_security_context(
                            'session_id' => $session_id);
$my_stub_config.set_security_context(
                   security_context => $session_id_context);

# 7 - Create a new session stub, using the session security context.
$my_vapi_stub = $my_stub_factory->create_stub(
                   'service_name' => 'Com::Vmware::Cis::Session',
                   'stub_config'  => $my_stub_config);