ref: match signature of authenticate_credentials (#74974)

pointed out by mypy 1.11

<!-- Describe your PR here. -->

src/sentry/api/authentication.py

@@ -107,7 +107,7 @@ def is_static_relay(request):
     return relay_info is not None
 
 
-def relay_from_id(request, relay_id) -> tuple[Relay | None, bool]:
+def relay_from_id(request: Request, relay_id: str) -> tuple[Relay | None, bool]:
     """
     Tries to find a Relay for a given id
     If the id is statically registered than no DB access will be done.
@@ -210,9 +210,14 @@ def authenticate(self, request: Request):
             raise AuthenticationFailed("Missing relay signature")
         return self.authenticate_credentials(relay_id, relay_sig, request)
 
-    def authenticate_credentials(self, relay_id, relay_sig, request):
+    def authenticate_credentials(
+        self, relay_id: str, relay_sig: str, request=None
+    ) -> tuple[AnonymousUser, None]:
         Scope.get_isolation_scope().set_tag("relay_id", relay_id)
 
+        if request is None:
+            raise AuthenticationFailed("missing request")
+
         relay, static = relay_from_id(request, relay_id)
 
         if relay is None: