I noted there was insufficient information. I asked whether multiple attempts were allowed. I presented a clearly stated potential solution.

Allowing multiple attempts is the norm. I raised the absence of code to achieve this (i.e. while loop) along with a lack of any handling of a successful login attempt.

Both the array and hash solutions read the entire file; obviously, this is not something specific to the hash solution. The point I made was that this was only done once regardless of the number of attempts.