change setup APIfor session to ensure correct state

src/delta_barth/management.py

@@ -11,10 +11,11 @@ from delta_barth.session import Session
 SESSION: Final[Session] = Session(HTTP_BASE_CONTENT_HEADERS)
 
 
-def set_data_path(
-    path: str,
+def setup(
+    data_path: str,
 ) -> None:  # pragma: no cover
-    SESSION.set_data_path(path)
+    SESSION.set_data_path(data_path)
+    SESSION.setup()
 
 
 def set_credentials(