**Describe the bug** W3 Credentials support [mutiple credential subjects](https://www.w3.org/TR/vc-data-model/#example-specifying-multiple-subjects-in-a-verifiable-credential), let's make querying and proof generation via js-sdk support it too.
Describe the bug
W3 Credentials support mutiple credential subjects, let's make querying and proof generation via js-sdk support it too.