Blocking inside GatewayBootsrap#withGateway throws IllegalStateException

[Shadorc]

This issue could be expected, I'm opening this for discussion as @quanticc suggested that this case should be handled (https://discord.com/channels/208023865127862272/278314058422157320/837808686125940748).

To Reproduce:

DiscordClient.create("")
    .gateway()
    .withGateway(gatewayDiscordClient -> {
        gatewayDiscordClient.getGuilds().collectList().block();
        return gatewayDiscordClient.onDisconnect();
    })
    .block();

Actual Behavior:
Exception in thread "main" java.lang.IllegalStateException: block()/blockFirst()/blockLast() are blocking, which is not supported in thread reactor-http-nio-2

Version: 3.1.6-SNAPSHOT and 3.2.0-SNAPSHOT