Open the Grokker app, and select "Already a member? Sign in"
Look for the question that says "Have Grokker through your employer?" And click "Sign in Here"
Then select “Delta Air Lines”
You will be brought to a sign-in screen. Pleaseenter your Delta Login/PPR and Password.
Click “SIGN IN” and you should be set.

If you need further assistance, please email support@grokker.com.