added api client to support multi-connections for IDs

api/e2eApi/backup.go

api/e2eApi/backupRestore.go

api/e2eApi/compress_test.go

api/e2eApi/e2eApi.go

api/e2eApi/identity.go

api/e2eApi/notifications.go

api/e2eApi/precan.go

api/e2eApi/utils.go

auth/interface.go

auth/partnerCallbacks.go

auth/receivedConfirm.go

auth/receivedRequest.go

auth/state.go

backup/backup.go

backup/backup_test.go

bindings/connect.go

cmd/callbacks.go

cmd/fileTransfer.go

cmd/group.go

cmd/init.go