Non-technical admin access for user changes

I am supporting a company WP site and the non-technical administrator wants to be able to do the following 2 things: 1) Add single users, 2) Change a user pw.

Without giving access to the regular WP-admin page, how would you set up a special page to handle these 2 user-related tasks?

I know that users can request their pw as a self-service feature, but this was what I was asked to do.

Thanks in advance for your ideas and help!