make python api tests work on gh when no env is set

.github/workflows/tests-download.yaml

@@ -47,4 +47,4 @@ jobs:
       - name: Run Download Tests
         run: poetry run pytest -ra -v -x -m "download"
         env:
-          TWITTER_BEARER_TOKEN: ${{ secrets.TWITTER_BEARER_TOKEN }}
+          TWITTER_BEARER_TOKEN: ${{ secrets.TWITTER_BEARER_TOKEN || '' }}

tests/extractors/test_twitter_api_extractor.py

@@ -13,7 +13,7 @@ class TestTwitterApiExtractor(TestExtractorBase):
 
     config = {
         "bearer_tokens": [],
-        "bearer_token": os.environ.get("TWITTER_BEARER_TOKEN", "TEST_KEY"),
+        "bearer_token": os.environ.get("TWITTER_BEARER_TOKEN") or "TEST_KEY",
         "consumer_key": os.environ.get("TWITTER_CONSUMER_KEY"),
         "consumer_secret": os.environ.get("TWITTER_CONSUMER_SECRET"),
         "access_token": os.environ.get("TWITTER_ACCESS_TOKEN"),