Some projects might be labelled with a sign. Those projects were created as a private process for invited members only. If users would like to participate although they were not invited yet, they can request access easily:
1. Click on the private project of your interest.
2. Click on the button below the project title.
3. Confirm the process by clicking in the pop up window.
4. After your request is being confirmed by the admin, you will be notified via email.