Be aware that you can also modify the FAKE script and embed both of those the subscriptionId, clientId and tenantId values instantly from the script and commit into source control. This is totally Risk-free to accomplish as these values aren't sufficient on their own to authenticate into Azure (see http://windows-easy-transfer-for02580.blogofoto.com/21013164/the-fact-about-software-deployment-tools-that-no-one-is-suggesting