Thanks @JakeSkinner and @PeterKnoop. Over the weekend I found another solution 😀.
licenses= gis.users.license_types
for license in licenses:
print(license["id"], license["name"], license["maxUsers"])
This returns:
advancedUT Advanced 2255
creatorUT Creator 2255
editorUT Editor 2255
fieldWorkerUT Mobile Worker 2255
GISProfessionalAdvUT GIS Professional Advanced 2255
GISProfessionalBasicUT GIS Professional Basic 2255
GISProfessionalStdUT GIS Professional Standard 2255
IndoorsUserUT Indoors User 451000
insightsAnalystUT Insights Analyst 0
storytellerUT Storyteller 0
viewerUT Viewer 2255
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