Add minimal authentication package for Azure using client credentials

sk/azure.py

@@ -0,0 +1,28 @@
+"""
+Minimal Authentication package for Azure.
+
+Uses client credentials - a secret or a certificate.
+"""
+
+import os
+import requests
+
+def secret_credentials_auth(
+        scope: str = "https://app.vssps.visualstudio.com/.default",
+        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")
+        ) -> str:
+    """
+    Authenticate using client credentials. Pass credentials via environment variables,
+    or directly as function parameters.
+    """
+    token_url = f"https://login.microsoftonline.com/{tenant_id}/oauth2/v2.0/token"
+    r = requests.get(token_url, data={
+        "grant_type": "client_credentials",
+        "client_id": client_id,
+        "client_secret": client_secret,
+        "scope": scope
+    })
+    r.raise_for_status()
+    return r.json().get("access_token", "")