Enter a code to unblock private projects

[pablogalve]

Is your feature request related to a problem? Please describe.
There are projects that are not suitable for the general population and for that reason should only be available for some specific users.

Describe the solution you'd like

• All the projects are listed in the project list, even if they are public or private.
• The private projects will ask for a password or code that will be given to participants and is needed to access the project.
• The code is asked only once, the first time