CheckMk api edit_user "Value None is not allowed here"

[FirstWithThisName]

Hello there,

I using the checkmk http api to create contact groups and and assign these groups to users.
Checkmk is getting the users from an ldap sync.

According to the doc i tried this:

curl “http://mycheckmk/side/check_mk/webapi.py?action=edit_users&_username=automation&_secret=1152d7ca-d116-4467-bbf9-2663916f5ce6” -d ‘request={“users”:{“existinguser”:{“set_attributes”:{“contactgroups”:[“existing_groups”]}}}}’

And I get the result:

{“result”: “Check_MK exception: Value None is not allowed here.”, “result_code”: 1}

I am using checkmk version 1.6.0p8.

This are the docs I used Command reference for the HTTP-API.

Does someone know why this is happening.

Thanks for your help

[r.sander (Robert Sander)]

The API call edit_users does not work for non-local accounts (i.e. LDAP users).

[FirstWithThisName]

I looked at the source code and found out that if rule based notification is disabled
the api looks up a user attribute called ‘notification_method’ and for all the most users this field did not exists and the exception got thrown.

Fixed it be enabling rulebased notifications.