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In a previous step you created a new space. As the creator, you have Space Admin permissions for that space. Let's grant some permissions to the 'project-team' group. This will allow the team to do things like access the Space Tools console, apply restrictions and remove content.
Now any user added to the 'project-team' group will be able to access Space Tools, and administer the space.
You need to be a space administrator to grant permissions using this method. Usually, the space administrator is the person who created the space, but they can also allow other space admins. Members of the administrators group can also do this via > General Configuration > Space Permissions.