In order to set your name in the app, press the menu button at the top left of the app to open the side menu.
Then, click the bottom when you’re email address should be shown. This should open your profile page.
Click the Edit Profile text button to open the form to edit your full name.
Once you have entered your name, press Submit in the top right hand corner. This should save your name to your profile.
Go back to the home screen to see your name in the app greeting.