For an overview of Member Splash users and permissions see this article.
To add administrative users (such as a staff account for use at the front desk) you will go to the Users menu and select Add New. Alternatively you can use the Add New button at the top of the users administration screen.
Choose a username, password and user role. Be sure to save the password somewhere safe. For security passwords are stored one-way encrypted so while you can always assign a new password if needed there is no way to recover the existing password should