🎨 Suppress management command output (in tests)

src/openforms/authentication/tasks.py

@@ -1,3 +1,5 @@
+from io import StringIO
+
 from django.core.management import call_command
 
 from openforms.celery import app
@@ -11,7 +13,7 @@ def hash_identifying_attributes(auth_info_id: int):
     auth_info.hash_identifying_attributes()
 
 
-@app.task
+@app.task(ignore_result=True)
 def update_saml_metadata() -> None:
     """
     A weekly task for updating the SAML metadata concerning DigiD/Eherkenning
@@ -20,5 +22,6 @@ def update_saml_metadata() -> None:
     `digid_eherkenning.management.commands` module of django-digid-eherkenning library.
     Updates the stored metadata file and prepopulates the db fields.
     """
-    call_command("update_stored_metadata", "digid")
-    call_command("update_stored_metadata", "eherkenning")
+    stdout = StringIO()
+    call_command("update_stored_metadata", "digid", stdout=stdout)
+    call_command("update_stored_metadata", "eherkenning", stdout=stdout)