---
- labels: labels = GET projects/:project_id/labels?
- create_label: label = POST projects/:project_id/labels?
- delete_label: DELETE projects/:project_id/labels?
- edit_label: label = PUT projects/:project_id/labels?
- subscribe_to_label: label = POST projects/:project_id/labels/:label_id/subscribe
- unsubscribe_from_label: POST projects/:project_id/labels/:label_id/unsubscribe
