intelcomdk all nRF9160 Feathers come pre-provisioned for nRF Cloud and use the passcode 1337. You can always open up your LTE Link Monitor and run
AT%CMNG=1 in AT mode (
at_client is a good sample for that). This will list all the current certificates that are active on the device. It will not show the contents for security reasons though.
If you re-provisioned, you’ll have to use the appropriate password you used during the API call to set the device up.
Also, very important, the device will not fully provision until you attempt to connect (which appears what you’ve done). Make sure though that your SIM is active and you have a good network connection.
I hope that helps!