diff --git a/docs/authentication.md b/docs/authentication.md
index 0f8acfe..bae648e 100644
--- a/docs/authentication.md
+++ b/docs/authentication.md
@@ -14,11 +14,11 @@ type Authenticator struct {
 
 ## NewAuthenticator Function
 
-The `NewAuthenticator` function is used to create a new `Authenticator` instance. It does not require any arguments and it initializes a new Authenticator with an empty `accessToken`.
+The `NewAuthenticator` function is used to create a new `Authenticator` instance. It requires the subdomain as an argument, and it initializes a new Authenticator with an empty `accessToken`.
 
 ```go
-func NewAuthenticator() *Authenticator {
-	return &Authenticator{}
+func NewAuthenticator(subdomain string) *Authenticator {
+	return &Authenticator{subdomain: subdomain}
 }
 ```
 
@@ -37,7 +37,7 @@ func (a *Authenticator) GenerateToken() error {
 The `RevokeToken` function is used to revoke an existing access token. It reads the `ONELOGIN_CLIENT_ID` and `ONELOGIN_CLIENT_SECRET` environment variables, creates a revocation request, sends it, and handles the response. If the revocation is successful, a confirmation message is printed.
 
 ```go
-func (a *Authenticator) RevokeToken(token, domain *string) error {
+func (a *Authenticator) RevokeToken(token *string) error {
     // implementation details
 }
 ```
diff --git a/pkg/onelogin/api/client.go b/pkg/onelogin/api/client.go
index c719322..8ae3424 100644
--- a/pkg/onelogin/api/client.go
+++ b/pkg/onelogin/api/client.go
@@ -38,7 +38,7 @@ type Authenticator interface {
 func NewClient() (*Client, error) {
 	subdomain := os.Getenv("ONELOGIN_SUBDOMAIN")
 	old := fmt.Sprintf("https://%s.onelogin.com", subdomain)
-	authenticator := authentication.NewAuthenticator()
+	authenticator := authentication.NewAuthenticator(subdomain)
 	err := authenticator.GenerateToken()
 	if err != nil {
 		return nil, err
diff --git a/pkg/onelogin/authentication/authenticator.go b/pkg/onelogin/authentication/authenticator.go
index 2dfde0d..a735475 100644
--- a/pkg/onelogin/authentication/authenticator.go
+++ b/pkg/onelogin/authentication/authenticator.go
@@ -19,10 +19,11 @@ const (
 
 type Authenticator struct {
 	accessToken string
+	subdomain   string
 }
 
-func NewAuthenticator() *Authenticator {
-	return &Authenticator{}
+func NewAuthenticator(subdomain string) *Authenticator {
+	return &Authenticator{subdomain: subdomain}
 }
 
 func (a *Authenticator) GenerateToken() error {
@@ -38,7 +39,7 @@ func (a *Authenticator) GenerateToken() error {
 	}
 
 	// Construct the authentication URL
-	authURL := fmt.Sprintf("https://api.onelogin.com%s", TkPath)
+	authURL := fmt.Sprintf("https://%s.onelogin.com%s", a.subdomain, TkPath)
 
 	// Create authentication request payload
 	data := map[string]string{
@@ -92,7 +93,7 @@ func (a *Authenticator) GenerateToken() error {
 	return nil
 }
 
-func (a *Authenticator) RevokeToken(token, domain *string) error {
+func (a *Authenticator) RevokeToken(token *string) error {
 	// Read environment variables
 	clientID := os.Getenv("ONELOGIN_CLIENT_ID")
 	clientSecret := os.Getenv("ONELOGIN_CLIENT_SECRET")
@@ -103,7 +104,7 @@ func (a *Authenticator) RevokeToken(token, domain *string) error {
 	}
 
 	// Construct the revoke URL
-	revokeURL := fmt.Sprintf("api.onelogin.com%s", RevokePath)
+	revokeURL := fmt.Sprintf("%s.onelogin.com%s", a.subdomain, RevokePath)
 
 	// Create revoke request payload
 	data := struct {