## Context
Recent PR introduced a verifyTransientToken inside the
GoogleAPIsProviderEnabledGuard guard. This is used to extract the
workspaceId from the token. This is working fine for the first call sent
to google however the callback is calling the same guard which is
causing an issue because the transientToken is missing from the
callback.
Imho, the same guard shouldn't be used by the callback but for the time
being I'm adding a check to prevent using feature flag when
transientToken is absent. In fact, it is present in the request but not
in the same key. Because the scope is only relevant for the first call,
I'm simply adding a check there.
cd6ed867be