Invite Users
With the release of 3.3.3 you can now directly invite new users to your specific project.
NOTE: This requires having the proper scope applied to invite others.

To add a new user to the project, simply select the Invite User button located in the upper right of the Project Details screen. Once selected, you can type in an email address to search if the new user has an existing account within the Organization overall. If an account already exists NimbleStory will grant them access to the new project. Alternatively, if they do not have an account you can send a new account invite and they will be requested to join.