There should be a method like `query_count`, for `scan(select='COUNT', …)`, which handles `LastEvaluatedKey`, similar to [this](https://gist.github.com/jesteria/775afd9cd0f4a2d0f6eb).
There should be a method like
query_count, forscan(select='COUNT', …), which handlesLastEvaluatedKey, similar to this.