Apps using large bot sharding must pass the shard query param to Get Current User Guilds.
Get Current User Guilds accepts a shard query param, which returns only the guilds stored in that shard.
Apps using large bot sharding are required to pass it — requests without shard now return 400 Bad Request. Valid values are 0 through max_concurrency - 1, using the max_concurrency returned by Get Gateway Bot,
Apps that are not using large bot sharding are unaffected.