diff --git a/sk/azure.py b/sk/azure.py
index b57ee43..1d57ac5 100644
--- a/sk/azure.py
+++ b/sk/azure.py
@@ -12,8 +12,53 @@ from cryptography import x509
 import hashlib
 import base64
 
+DEVOPS_SCOPE = "https://app.vssps.visualstudio.com/.default"
+
+def get_token(
+        tenant_id: str | None = None,
+        client_id: str | None = None,
+        client_secret: str | None = None,
+        pem_path: str | None = None
+    ) -> str:
+    """
+    Obtain a token for DevOps using DefaultAzureCredential.
+    """
+    try:
+        if tenant_id and client_id and client_secret:
+            from azure.identity import ClientSecretCredential
+            return ClientSecretCredential(
+                tenant_id=tenant_id,
+                client_id=client_id,
+                client_secret=client_secret
+            ).get_token(DEVOPS_SCOPE).token
+        elif tenant_id and client_id and pem_path:
+            from azure.identity import CertificateCredential
+            return CertificateCredential(
+                tenant_id=tenant_id,
+                client_id=client_id,
+                certificate_path=pem_path
+            ).get_token(DEVOPS_SCOPE).token
+        else:
+            from azure.identity import DefaultAzureCredential
+            return DefaultAzureCredential().get_token(DEVOPS_SCOPE).token
+    except ImportError:
+        if tenant_id and client_id and client_secret:
+            return secret_credentials_auth(
+                tenant_id=tenant_id,
+                client_id=client_id,
+                client_secret=client_secret
+            )
+        elif tenant_id and client_id and pem_path:
+            return certificate_credentials_auth(
+                tenant_id=tenant_id,
+                client_id=client_id,
+                pem_path=pem_path
+            )
+        else:
+            raise ValueError("Either client_secret or pem_path must be provided, if no azure-identity package is installed.")
+
 def secret_credentials_auth(
-        scope: str = "https://app.vssps.visualstudio.com/.default",
+        scope: str = DEVOPS_SCOPE,
         tenant_id: str = os.environ.get("AZURE_TENANT_ID", ""),
         client_id: str = os.environ.get("AZURE_CLIENT_ID", ""),
         client_secret: str = os.environ.get("AZURE_CLIENT_SECRET")
@@ -33,7 +78,7 @@ def secret_credentials_auth(
     return r.json().get("access_token", "")
 
 def certificate_credentials_auth(
-        scope: str = "https://app.vssps.visualstudio.com/.default",
+        scope: str = DEVOPS_SCOPE,
         tenant_id: str = os.environ.get("AZURE_TENANT_ID", ""),
         client_id: str = os.environ.get("AZURE_CLIENT_ID", ""),
         pem_path: str = os.environ.get("AZURE_CLIENT_CERTIFICATE_PATH", "")
diff --git a/sk/devops.py b/sk/devops.py
index 335969a..8c3a412 100644
--- a/sk/devops.py
+++ b/sk/devops.py
@@ -108,8 +108,6 @@ class DevOps():
 
 class Organization(DevOps):
     def __init__(self, org_url: str, token: str | None = None, api_version: str = DEVOPS_API_VERSION):
-        if token is None:
-            token = DefaultAzureCredential().get_token(DEVOPS_SCOPE).token
         super().__init__(org_url, token, api_version)
 
     @property
diff --git a/tests.py b/tests.py
index 30f83a1..ae89bad 100755
--- a/tests.py
+++ b/tests.py
@@ -1,12 +1,12 @@
 #!/usr/bin/env python3
 import unittest
 import requests
-from azure.identity import DefaultAzureCredential
-from sk.devops import DEVOPS_SCOPE, Organization, Repository, Project, Item
+from sk.devops import Organization, Repository, Project, Item
+from sk.azure import get_token
 
 # Get the token outside the test class to speed up tests.
 # Each Unit test instantinates the class, so doing it here avoids repeated authentication.
-token = DefaultAzureCredential().get_token(DEVOPS_SCOPE).token
+token = get_token()
 
 class Test01(unittest.TestCase):
     def setUp(self):