Hello Bob,
To find all content for each user in a AGOL organization, you would just search for each user account and then loop through their items. Here is an example....
import arcgis
from arcgis.gis import GIS
gis = GIS(None,'username', 'password', verify_cert=False)
def findItems():
try:
Accounts = gis.users.search(query= None, max_users =50)
for user in Accounts:
userItem = user.items(max_items=10)
if userItem:
for item in userItem:
print("The item {0} is of type {1} and is owned by {2}".format(item.title,item.type,item.owner))
except Exception as e:
print(e)
findItems()
I think this is what you are trying to do.