You must sign our CLA before we can accept your contributions. The first time you submit a PR, a bot will walk you through the automated process. On subsequent contributions you will not be prompted unless the content of the agreement has changed.
We sincerely appreciate your contribution and have worked hard to ensure the CLA wording is simple, clear, and concise. It does not require you to give up ownership of your contributions, or prevent you from using your contributions for other purposes. We've put the agreement in place to explicitly clarify your intellectual property license grant, for your protection as well as ours.