Add global right to users through web api

We are using Developer Editon v10.5.1 (90531), but in the next weeks we wil update to the Enterprise version 10.7
SonarQube is deployed in a OpenShift environment with the helm-chart-sonarqube

I am looking for a way to use the web api to give specific users the create projects right.
In the web api api/permissions/add_user the following is mentioned:

The permission you would like to grant to the user
Possible values for global permissions: admin, gateadmin, profileadmin, provisioning, scan, applicationcreator, portfoliocreator

But I don’t see a projectcreator permission.

Is this only possible through the gui within the global permission page?

Regards,

Bert

Correct is /api/permissions/add_user?login=xxx&permission=provisioning
To see what’s going on under the hood, you can use the browser developer tools and then in the Sonarqube web UI run the action you want to examine.