counter.reset when the key is not initialized

As per this line https://github.com/Kong/lua-resty-counter/blob/master/lib/resty/counter.lua#L98 , if the `key` is not initialized in shared dict, it would always be initialized with 0, no matter what the value of the argument `number` is? Is this the right understanding? If yes, should it be that way?

Start with lib/resty/counter.lua at line 98 and trace counter.reset when the key is absent from the shared dictionary. Confirm whether the number argument is intentionally ignored in that case; done means the expected behavior is clarified and the implementation or coverage reflects the decision.

Written by the indexing model from the issue text.