---
- group_boards: boards = GET groups/:group_id/boards
- group_board: board = GET groups/:group_id/boards/:board_id
- group_board_lists: lists = GET groups/:group_id/boards/:board_id/lists
- group_board_list: list = GET groups/:group_id/boards/:board_id/lists/:list_id
- create_group_board_list: list = POST groups/:group_id/boards/:board_id/lists?
- edit_group_board_list: list = PUT groups/:group_id/boards/:board_id/lists/:list_id?
- delete_group_board_list: DELETE groups/:group_id/boards/:board_id/lists/:list_id