Note: before people can become a member of a project they need to have an account on the Trap.NZ website. They can register via the Subscription link on the home page: https://trap.nz/user/register
To get people to join you need to send them the subscription link for your project. This can be found under the Members tab in your project. Once users have applied to join they will appear as “pending” on that page. You can then activate their membership via the link alongside their account. Click the edit link to give them the role you want within the project.