You have to follow the steps as below:
1. Go to the Google Developers Console- http://developer.dribbble.com/ Select an Application, or Register a new one.
2. Fill the information such as : Name of application, Description, Website URL, Callback URL. And
click on Register Application Button.
3. Copy client Access token to clipboard. And Paste the Client Access Token to Dashboard>SlideDeck 2 > Advanced Options > Last Used
Dribbble OAuth Key, And save the settings by clicking on Update Options button.
For detail information and screen shots please find the attached document.