- `handle_response_error()` method added
- raises exception on error responses
- Model added `thingivers.types.users.ThingiverseUser`
- `get_username_things()` method added (`/users/{username}/things`)
- Fetches user's list of things
- get_username_favorites() method added (`/users/{username}/favorites`)
- Fetches user's list of favorites
- get_username_likes() method added (`/users/{username}/likes`)
- Fetches user's list of likes
- `get_username_copies()` method added (`/users/{username}/copies`)
- Fetches user's list of copies
- `get_username_collections()` method added (`/users/{username}/collections`)
- Fetches user's list of collections
- `get_username_downloads()` method added (`/users/{username}/downloads`)
- Fetches user's list of downloads
- `get_username_collected_things()` method added (`/users/{username}/all-collected-things`)
- Fetches a list of collected things by a given username
- `get_username_unread_message_count()` method added (`/users/unread-message-count`)
- Fetches a count of unread messages