The command to implement in the githut action .github/workflows/main.yml file as the last step is the following:

      - name: Update coverage
        env:
          COVERALLS_REPO_TOKEN: ${{ secrets.coverage_token }}
        run: |
          coverage report -m
          coveralls

This had failed when calling coverage report -m because of an import error on python 3.6 --> need to find out why and a solution