diff --git a/auth.go b/auth.go
index 062ce12..6e31cb6 100644
--- a/auth.go
+++ b/auth.go
@@ -1,14 +1,14 @@
 package sdk
 
 import (
-	"github.com/clawio/authentication/service"
-	"github.com/clawio/codes"
+	"github.com/clawio/clawiod/codes"
+	"github.com/clawio/clawiod/services/authentication"
 )
 
 type (
-	// AuthService is the interface that deals with the calls to an authentication service.
+	// AuthService is the interface that deals with the calls to an authentication authentication.
 	AuthService interface {
-		Authenticate(username, password string) (string, *codes.Response, error)
+		Token(username, password string) (string, *codes.Response, error)
 	}
 
 	authService struct {
@@ -17,19 +17,19 @@ type (
 	}
 )
 
-// Authenticate authenticates a user using a username and a password.
-func (s *authService) Authenticate(username, password string) (string, *codes.Response, error) {
-	authNRequest := &service.AuthenticateRequest{
+// Token gets an access token after authenticating the user with username and password.
+func (s *authService) Token(username, password string) (string, *codes.Response, error) {
+	tokenRequest := &authentication.TokenRequest{
 		Username: username,
 		Password: password}
-	req, err := s.client.newRequest("POST", "token", authNRequest)
+	req, err := s.client.newRequest("POST", "token", tokenRequest)
 	if err != nil {
 		return "", nil, err
 	}
-	authNResponse := &service.AuthenticateResponse{}
-	resp, err := s.client.do(req, authNResponse, true)
+	tokenResponse := &authentication.TokenResponse{}
+	resp, err := s.client.do(req, tokenResponse, true)
 	if err != nil {
 		return "", resp, err
 	}
-	return authNResponse.AccessToken, resp, nil
+	return tokenResponse.AccessToken, resp, nil
 }
diff --git a/client.go b/client.go
index aabca15..e03f245 100644
--- a/client.go
+++ b/client.go
@@ -8,7 +8,7 @@ import (
 	"net/http"
 	"net/url"
 
-	"github.com/clawio/codes"
+	"github.com/clawio/clawiod/codes"
 )
 
 // A client manages communication with the ClawIO API.
diff --git a/data.go b/data.go
index 23933cf..b5b944c 100644
--- a/data.go
+++ b/data.go
@@ -4,7 +4,7 @@ import (
 	"io"
 	"path"
 
-	"github.com/clawio/codes"
+	"github.com/clawio/clawiod/codes"
 )
 
 // DataService is the interface that specifies the methods to call a data service.
diff --git a/metadata.go b/metadata.go
index 6ef8743..128f98b 100644
--- a/metadata.go
+++ b/metadata.go
@@ -3,13 +3,14 @@ package sdk
 import (
 	"path"
 
-	"github.com/clawio/codes"
-	"github.com/clawio/entities"
+	"github.com/clawio/clawiod/codes"
+	"github.com/clawio/clawiod/entities"
 )
 
 // MetaDataService is the interface that specifies the methods to call a metaData service.
 type MetaDataService interface {
 	Init() (*codes.Response, error)
+	CreateTree(pathSpec string) (*codes.Response, error)
 	ExamineObject(pathSpec string) (*entities.ObjectInfo, *codes.Response, error)
 	ListTree(pathSpec string) ([]*entities.ObjectInfo, *codes.Response, error)
 	DeleteObject(pathSpec string) (*codes.Response, error)
@@ -60,6 +61,7 @@ func (s *metaDataService) ListTree(pathSpec string) ([]*entities.ObjectInfo, *co
 	}
 	return oinfos, resp, nil
 }
+
 func (s *metaDataService) DeleteObject(pathSpec string) (*codes.Response, error) {
 	pathSpec = path.Join("/", pathSpec)
 	req, err := s.client.newRequest("DELETE", "delete"+pathSpec, nil)
@@ -69,6 +71,15 @@ func (s *metaDataService) DeleteObject(pathSpec string) (*codes.Response, error)
 	return s.client.do(req, nil, true)
 }
 
+func (s *metaDataService) CreateTree(pathSpec string) (*codes.Response, error) {
+	pathSpec = path.Join("/", pathSpec)
+	req, err := s.client.newRequest("POST", "createtree"+pathSpec, nil)
+	if err != nil {
+		return nil, err
+	}
+	return s.client.do(req, nil, true)
+}
+
 func (s *metaDataService) MoveObject(sourcePathSpec, targetPathSpec string) (*codes.Response, error) {
 	sourcePathSpec = path.Join("/", sourcePathSpec)
 	targetPathSpec = path.Join("/", targetPathSpec)