Setup
Before you can connect to your site with OAuth, you'll need to get it set up.
Right now, you'll need to install the plugin from GitHub. Inside your plugin directory, clone the plugin down:
git clone https://github.com/WP-API/OAuth1
Once you've done this, head to your WordPress dashboard and activate the plugin. You should see an "Applications" item appear under the users menu: this is where you manage OAuth clients.