add example setup for management refactor

management/refactor/users/manager.go

@@ -0,0 +1,24 @@
+package users
+
+import "github.com/netbirdio/netbird/management/refactor/peers"
+
+type Manager interface {
+	GetUser(id string) (User, error)
+}
+
+type DefaultManager struct {
+	repository  repository
+	peerManager peers.Manager
+}
+
+func NewDefaultManager(repository repository, peerManager peers.Manager) *DefaultManager {
+	return &DefaultManager{
+		repository:  repository,
+		peerManager: peerManager,
+	}
+}
+
+func (d DefaultManager) GetUser(id string) (User, error) {
+	// TODO implement me
+	panic("implement me")
+}