credentials do hlavicky + crypto + docu

app/config.py

@@ -1,5 +1,5 @@
 import os
-from dataclasses import dataclass
+from dataclasses import dataclass, replace
 
 
 @dataclass(frozen=True)
@@ -10,6 +10,7 @@ class Settings:
     tenant_id: str = os.getenv("MS365_TENANT_ID", "")
     client_id: str = os.getenv("MS365_CLIENT_ID", "")
     client_secret: str = os.getenv("MS365_CLIENT_SECRET", "")
+    credential_encoding_secret: str = os.getenv("MS365_CREDENTIAL_ENCODING_SECRET", "")
     graph_base_url: str = os.getenv("MS365_GRAPH_BASE_URL", "https://graph.microsoft.com/v1.0")
     graph_scope: str = os.getenv("MS365_GRAPH_SCOPE", "https://graph.microsoft.com/.default")
     request_timeout_seconds: float = float(os.getenv("MS365_REQUEST_TIMEOUT_SECONDS", "30"))
@@ -22,5 +23,13 @@ class Settings:
     def is_configured(self) -> bool:
         return bool(self.tenant_id and self.client_id and self.client_secret)
 
+    def with_credentials(self, tenant_id: str, client_id: str, client_secret: str) -> "Settings":
+        return replace(
+            self,
+            tenant_id=tenant_id,
+            client_id=client_id,
+            client_secret=client_secret,
+        )
+
 
 settings = Settings()