Add ability to send email notification to new users AFTER their account has been created

Current use case:
Project manager creates a new project and then creates new users for this project. Often this can happen before a project kick-off and the project manager is getting ahead of their work by setting up the project in Project Pier. At this point the manager doesn't want to notify the new users of their account because the project hasn't kicked off yet, so the manager chooses not to notify the users yet. Unfortunately, after the initial user setup view, there's no way to notify a user of their login credentials again.

Proposed new feature:
Please add, in the user profile pages a button to notify a user of their account and their credentials. This way managers who setup a project w/ users before a project kickoff and easily notify new users of their credentials when the timing is appropriate.

Note: This is an often used feature in Basecamp and popular amongst many project managers in my office.