Unable to log into GHIN app

When enter my membership number and name I get a Pop-up that states:

No Memberships

No Membership information found for this number and last name.

I have contacted my local Golf Association and they were able to log into the android app with my info, but I have not been successful on and iPhone X or iPad Pro. I have tried deleting app and reinstalling, have check all settings such as cellular and the app settings itself. So far, no succes.

Can anyone help with this? Thanks