To give another user access to Google Analytics open your Google Analytics account and navigate to the Admin area.
Click Property User Management
Within user management you will see who has access to the property. Here you can add, remove or manage a user's permissions. To add a new user click the plus icon at the type right > Add users
Under the Permissions section make sure to check the 3 boxes highlighted in the image below (Edit, Collaborate, Read & Analyze). Lastly, add the users email and click Add.