arrow::Result session_id()

in src/afs.cc [1637:1647]

• 11 lines of code
• 2 McCabe index (conditional complexity)

	arrow::Result<uint64_t> session_id(const arrow::flight::ServerCallContext& context)
	{
		auto middleware = reinterpret_cast<HeaderAuthServerMiddleware*>(
			context.GetMiddleware("header-auth"));
		if (!middleware)
		{
			return arrow::flight::MakeFlightError(
				arrow::flight::FlightStatusCode::Unauthenticated, "no authorization");
		}
		return middleware->session_id();
	}