fix: do not use blank ID_KEY

Author: nijel

social_core/backends/base.py

@@ -21,7 +21,7 @@ class BaseAuth:
 
     name = ""  # provider name, it's stored in database
     supports_inactive_user = False  # Django auth
-    ID_KEY: str
+    ID_KEY: str = ""
     EXTRA_DATA: list[str | tuple[str, str] | tuple[str, str, bool]] | None = None
     GET_ALL_EXTRA_DATA = False
     REQUIRES_EMAIL_VALIDATION = False

social_core/utils.py

@@ -177,7 +177,7 @@ def partial_pipeline_data(backend, user=None, partial_token=None, *args, **kwarg
             # Normally when resuming a pipeline, request_data will be empty. We
             # only need to check for a uid match if new data was provided (i.e.
             # if current request specifies the ID_KEY).
-            if backend.ID_KEY in request_data:
+            if backend.ID_KEY and backend.ID_KEY in request_data:
                 id_from_partial = partial.kwargs.get("uid")
                 id_from_request = request_data.get(backend.ID_KEY)