diff --git a/action.go b/action.go
index 6ea86f2..b94c5b2 100644
--- a/action.go
+++ b/action.go
@@ -6,13 +6,19 @@ import (
 	"github.com/Selly-Modules/usermngmt/user"
 )
 
-// Create ...
-func (s Service) Create(payload model.UserCreateOptions) error {
+//
+// User
+//
+
+// user methods
+
+// CreateUser ...
+func (s Service) CreateUser(payload model.UserCreateOptions) error {
 	return user.Create(payload)
 }
 
-// Update ...
-func (s Service) Update(userID string, payload model.UserUpdateOptions) error {
+// UpdateUser ...
+func (s Service) UpdateUser(userID string, payload model.UserUpdateOptions) error {
 	return user.UpdateByUserID(userID, payload)
 }
 
@@ -26,12 +32,18 @@ func (s Service) ChangeUserStatus(userID, newStatus string) error {
 	return user.ChangeUserStatus(userID, newStatus)
 }
 
-// All ...
-func (s Service) All(query model.UserAllQuery) model.UserAll {
+// GetAllUser ...
+func (s Service) GetAllUser(query model.UserAllQuery) model.UserAll {
 	return user.All(query)
 }
 
-// RoleCreate ...
-func (s Service) RoleCreate(payload model.RoleCreateOptions) error {
+//
+// Role
+//
+
+// role methods
+
+// CreateRole ...
+func (s Service) CreateRole(payload model.RoleCreateOptions) error {
 	return role.Create(payload)
 }
diff --git a/constant.go b/constant.go
deleted file mode 100644
index fe98da9..0000000
--- a/constant.go
+++ /dev/null
@@ -1,6 +0,0 @@
-package usermngmt
-
-// Constant ...
-const (
-	tablePrefixDefault = "usermngmt"
-)
diff --git a/internal/constant.go b/internal/constant.go
index c41e88b..c048f83 100644
--- a/internal/constant.go
+++ b/internal/constant.go
@@ -5,4 +5,6 @@ const (
 	timezoneHCM = "Asia/Ho_Chi_Minh"
 
 	passwordHashingCost = 14
+
+	TablePrefixDefault = "usermngmt"
 )
diff --git a/model/role_request.go b/model/role_request.go
index db992a0..81a8e0f 100644
--- a/model/role_request.go
+++ b/model/role_request.go
@@ -4,4 +4,3 @@ package model
 type RoleCreateOptions struct {
 	Name string
 }
-
diff --git a/model/role_response.go b/model/role_response.go
index 117cf85..abe20f0 100644
--- a/model/role_response.go
+++ b/model/role_response.go
@@ -5,4 +5,4 @@ type RoleShort struct {
 	ID      string `json:"_id"`
 	Name    string `json:"name"`
 	IsAdmin bool   `json:"isAdmin"`
-}
\ No newline at end of file
+}
diff --git a/usermngmt.go b/usermngmt.go
index 8df9586..b2a2236 100644
--- a/usermngmt.go
+++ b/usermngmt.go
@@ -6,6 +6,7 @@ import (
 
 	"github.com/Selly-Modules/mongodb"
 	"github.com/Selly-Modules/usermngmt/database"
+	"github.com/Selly-Modules/usermngmt/internal"
 )
 
 // MongoDBConfig ...
@@ -36,7 +37,7 @@ func Init(config Config) (*Service, error) {
 
 	// If prefixTable is empty then it is usermngmt
 	if config.TablePrefix == "" {
-		config.TablePrefix = tablePrefixDefault
+		config.TablePrefix = internal.TablePrefixDefault
 	}
 
 	// Connect MongoDB