[keycloak-user] User Attributes -> User Attribute Mapper, Client Attributes -> no mapper?

Hi, We're adding specific User Attributes to Users, and use the User Attribute protocol mapper to add those attributes to the JWT bearer tokens the user gets when logging in. This works fine for keycloak Users (natural persons) using our secured endpoints (APIs). We'd like to use the same concept for Clients (internal applications, so no natural person is involved) that use our secured endpoints. These Clients use client credentials to get a bearer token from Keycloak. Clients can have Client Attributes, so that's half the problem fixed. The other half is the protocol mapper: there is no Client Attribute protocol mapper. Is there a specific reason there is no Client Attribute protocol mapper? Are we doing something we shouldn't do? ;) Thanks, Bram Vonk