* feat(svc/multiusers): add multi-users service
* test(multiusers): add unit tests for user store
* feat(multiusers): add multiusers service and refactor userstore
* feat(multiusers): add adduser api and tests
* feat(client): add adduser api
* fix(uploader, files/handlers): fix incorrect unlock, catch and check after calling api
* fix(uploader): fix uploader test
* feat(files): add uploadings api
* fix(files): register uploading handlers to api
Co-authored-by: Jia He <jiah@nvidia.com>