coroutine and return its result. Issue a
cancellation request after seconds have elapsed. When a timeout
occurs, no exception is raised. Instead, timeout_result is
returned.

If coro is None, the result is an asynchronous context manager
that applies a timeout to a block of statements. For the context
manager case, the resulting context manager object has an expired
attribute set to True if time expired.

Note: ignore_after() may also be composed with other timeout
operations. TimeoutCancellationError and UncaughtTimeoutError
exceptions might be raised according to the same rules as for
timeout_after().
FT)