Several steps below require you to access your application gear directly with SSH and SCP.  To do this you will need to generate and install SSH public keys on the workstation or laptop you use for access.  This process is described in the Settings tab in the management console.  Basically, you will use the rhc setup command to create and upload the keys from your workstation or laptop.  First you will need to install the OpenShift client tools if you haven't already.  The process of installing the OpenShift client tools and SSH clients (if needed) is described there.
SSH Keys on the Settings Page