sourceforge/lister: Add credentials parameter

The credentials parameter is not optional due to the instance constructor logic. Even if
unused, this must be provided to the lister (from the task standpoint).

Related to T3310#64801

swh/lister/sourceforge/lister.py

@@ -20,7 +20,7 @@ from swh.scheduler.interface import SchedulerInterface
 from swh.scheduler.model import ListedOrigin
 
 from .. import USER_AGENT
-from ..pattern import Lister
+from ..pattern import CredentialsType, Lister
 
 logger = logging.getLogger(__name__)
 
@@ -108,9 +108,17 @@ class SourceForgeLister(Lister[SourceForgeListerState, SourceForgeListerPage]):
     # Part of the lister API, that identifies this lister
     LISTER_NAME = "sourceforge"
 
-    def __init__(self, scheduler: SchedulerInterface, incremental: bool = False):
+    def __init__(
+        self,
+        scheduler: SchedulerInterface,
+        incremental: bool = False,
+        credentials: Optional[CredentialsType] = None,
+    ):
         super().__init__(
-            scheduler=scheduler, url="https://sourceforge.net", instance="main"
+            scheduler=scheduler,
+            url="https://sourceforge.net",
+            instance="main",
+            credentials=credentials,
         )
 
         # Will hold the currently saved "last modified" dates to compare against our