loadMembers().get() not working for me :(

[Zeloslaw]

Hello,
I want to receive information about the number of all members of my discord. For this, I wrote the command:

Guild guild= jda.getGuildById(GUILD_ID);
List<Member> members = guild.loadMembers().get();

I turned on GatewayIntent.GUILD_MEMBERS:

jda = JDABuilder.createDefault(botToken)
                    .enableIntents(GatewayIntent.GUILD_MEMBERS)
                    .setMemberCachePolicy(MemberCachePolicy.ALL)
                    .build();

In application dashboard under the Privileged Gateway Intents section, i set enable SERVER MEMBERS INTENT and MESSAGE CONTENT INTENT.
Unfortunately it still doesn't work. Error message:

[main] INFO net.dv8tion.jda.api.JDA - Login Successful!
[JDA MainWS-ReadThread] INFO net.dv8tion.jda.internal.requests.WebSocketClient - Connected to WebSocket
[JDA MainWS-ReadThread] INFO net.dv8tion.jda.api.JDA - Finished Loading!
java.lang.UnsupportedOperationException: Blocking operations are not permitted on the gateway thread
	at net.dv8tion.jda.internal.utils.concurrent.task.GatewayTask.get(GatewayTask.java:96)
	at Main.onMessageReceived(Main.java:277)

I found in the documentation:
You MUST NOT use blocking operations such as Task.get()! The response handling happens on the event thread by default.
But how do I check it and apply it?

What am I doing wrong?

[HardstylesDev]

You'd use the onSuccess consumer, it'd look something like this

guild.loadMembers().onSuccess(members -> {
    // members is a List<Member> containing all members in the guild
});