custom publisher to avoid handling error in the sink

PublisherCatchAndExit.swift

extension Publisher {
    func catchAndExit(_ completion: @escaping (Self.Failure) -> Void) -> AnyPublisher<Self.Output, Never> {
        return self
            .map { output -> Optional<Output> in output }
            .catch { error -> Just<Optional<Output>> in
                completion(error)

                return Just(nil)
            }
            .filter { $0 != nil }
            .map { $0! }
            .eraseToAnyPublisher()
    }
}