Can't use Android SDK Chat

Hey!
We've moved to the new Zendesk account and lost the access to SDK chat in the mobile app. It is offline at the moment. 

Old code was:
Chat.INSTANCE.init(applicationContext, "account key", "app id")

Now we can't find the account key and app id, the code snippet is also different. When we add new instance nothing happens.

New code:
Zendesk.INSTANCE.init(context, "link",
    "app id",
    "client id");
Support.INSTANCE.init(Zendesk.INSTANCE);

And it doesn't work. What should we fix?