Go to www.google.com/analytics and Sign in.
Click on the ADMIN tab.
Click on the Analytics account in which you want to add a new user.
Click the USERS tab.
Click + NEW USER.
Add the user. Don’t forget to choose between “Administrator” (can create reports, access complete stats, etc) or “User” (can only see stats and reports). Also, make sure to pick a “Profile” and click “Add >>”.