Getting terms from a custom post type

HI,
i am trying to get the category from a custom post type
so referring to this : https://github.com/timber/timber/wiki/TimberPost#terms
i am doing like that

{% for person in people %}

            {% for term in person.terms('category') %}
                <li><a href="{{term.link}}">{{term.name}}</a></li>
            {% endfor %}
           

  {% endfor %}

but it doesn’t work…