Basic authentication for Rest-services does not accept webservice-users

I have used basic authentication for a published Rest-services. When activating the Rest-service in the Swagger UI i have used a webservice-user to login. This results in the error: com.mendix.systemwideinterfaces.MendixRuntimeException: com.mendix.systemwideinterfaces.core.AuthenticationRuntimeException: Login FAILED: client login attempt for web service user 'ws3'. I expected logging in with a webservice-user would be allowed for Rest-services. Is this a bug or is my expectation wrong?  
1 answers

Sadly, the “IsWebservice” boolean is only used by the SOAP services.

REST webservices need to be regular user accounts, which is confusing as hell.

But that's just the way it is.