Error when running command

[outoftowner]

when i run this command:

rhc cartridge add -a -c https://raw.githubusercontent.com/wshearn/openshift-cartridge-osbs-client/master/metadata/manifest.yml

it returns this error:

The cartridge 'https://raw.githubusercontent.com/wshearn/openshift-cartridge-osbs-client/maste r/metadata/manifest.yml' will be downloaded and installed Adding https://raw.githubusercontent.com/wshearn/openshift-cartridge-osbs-client/master /metadata/manifest.yml to application 'http://blog.sixpackpolitics.com' ... You must specify an application with -a, or run this command from within Git directory cloned from OpenShift. Usage: rhc cartridge-add <cartridge_type> [--namespace NAME] [--app NAME] Pass '--help' to see the full list of options

I'm very new to openshift so any help would be super appreciated. thanks!