GMail reading P2

// You may have guessed this is body of suspend function as I'm using Kotlin coroutines.
// Service is com.google.api.services.gmail.Gmail.

try {
    val executeResult: ListMessagesResponse? =
        withContext(Dispatchers.IO) {
            service.users().messages()?.list("me")?.setQ("to:me")?.execute()
        }

    // For the sake of test, let's get 1st message on the list
    val message: Message? = executeResult?.messages?.get(0)

    // Actual reading of the message, by message ID
    val messageRead = withContext(Dispatchers.IO) {
        service.users().messages()
            ?.get(FirebaseAuth.getInstance().currentUser?.email, message?.id)
            ?.setFormat("full")?.execute()
    }

    // At this point you can get to short version of your message body as messageRead?.snippet
} catch (e: UserRecoverableAuthIOException) {
    startActivityForResult(e.intent, RQ_GMAIL_ACCESS);
}