added code coverage token

Author: brendancol

.github/workflows/codecov.yml

@@ -33,6 +33,7 @@ jobs:
     - name: Upload coverage to Codecov
       uses: codecov/codecov-action@v3
       with:
+        token: ${{ secrets.CODECOV_TOKEN }}
         env_vars: OS,PYTHON
-        fail_ci_if_error: false
+        fail_ci_if_error: true
         verbose: true