Set terminusx token only if it is from our repo (#374)

Otherwise it prevents PRs from forked repos to run the tests
correctly. Since they can't access the secret TerminusX token.

Author: rrooij

.github/workflows/python.yml

@@ -27,8 +27,6 @@ jobs:
   build:
     needs: check
     runs-on: ubuntu-latest
-    env:
-      TERMINUSX_TOKEN: ${{ secrets.TERMINUSX_TOKEN_DEV }}
     strategy:
       matrix:
         python-version: ["3.8", "3.9", "3.10"]
@@ -46,6 +44,7 @@ jobs:
         tox -e deps
     - name: Test with pytest
       run: |
+        [[ "$GITHUB_REPOSITORY" == "terminusdb/terminusdb-client-python" && "$GITHUB_EVENT_NAME" == "push" ]] && export TERMINUSX_TOKEN='${{ secrets.TERMINUSX_TOKEN_DEV }}'
         tox -e test
     - name: Coverage report
       uses: codecov/codecov-action@v2