Token bucket
Configures a token bucket, typically used for rate limiting.
(uint32) The maximum tokens that the bucket can hold. This is also the number of tokens that the bucket initially contains.
() The number of tokens added to the bucket during each fill interval. If not specified, defaults to a single token.
(Duration, REQUIRED) The fill interval that tokens are added to the bucket. During each fill interval tokens_per_fill are added to the bucket. The bucket will never contain more than max_tokens tokens.