A General Identity object. This does not have to be a private key (for example, the Anonymous identity), but it must be able to transform request.
Get the principal represented by this identity. Normally should be a Principal.selfAuthenticating().
Principal.selfAuthenticating()
Transform a request into a signed version of the request. This is done last after the transforms on the body of a request. The returned object can be anything, but must be serializable to CBOR.
A General Identity object. This does not have to be a private key (for example, the Anonymous identity), but it must be able to transform request.