Updating "report:export_to_zenodo" rake task to check for environment variables.
Updating "report:export_to_zenodo" rake task to check for environment variables.

And if they're not found provide an informative message to the user.

lagotto/lagotto,ankurpohekar/Lagotto,ankurpohekar/Lagotto,CrossRef/lagotto,ankurpohekar/Lagotto,articlemetrics/lagotto,lagotto/lagotto,ankurpohekar/Lagotto,ankurpohekar/Lagotto,articlemetrics/lagotto,msingh05/lagotto,CrossRef/lagotto,ankurpohekar/Lagotto,msingh05/lagotto,lagotto/lagotto,ankurpohekar/Lagotto,CrossRef/lagotto,articlemetrics/lagotto,msingh05/lagotto