To preserve the repository secret free we put the credentials in some environment variables. Do it like this:
echo "export amazon_secret=<string>" >> ~/app-root/data/.bash_profile
echo "export amazon_code=<string>" >> ~/app-root/data/.bash_profile
echo "export amazon_key=<string>" >> ~/app-root/data/.bash_profile
echo "export ebay_appid=<string>" >> ~/app-root/data/.bash_profile
echo "export dumbo_url=http://dumbourl.com/" >> ~/app-root/data/.bash_profile
echo "export outpan_url=<string>" >> ~/app-root/data/.bash_profile