RevTurbineClientSessionProvider
RevTurbineClientSessionProvider = () =>
string|Promise<string>
Mints a short-lived client-session token for the signed-in user (plan 191
Q-6). Called by the SDK on first need, after identify(), and again when a
token is rejected as expired. Return the raw rt_client_… token your
backend minted from POST /api/sdk/client-sessions.
Returns
Section titled “Returns”string | Promise<string>