def __init__(self, apikey=None, handle=None, external_url=None, security=None):
self._apikey = apikey<EOL>self._handle = handle<EOL>self._security = security<EOL>self._external_url = external_url<EOL>self._transformation_tasks = []<EOL>
```python
from filestack import Client

client = Client("<API_KEY>")
filelink = client.upload(filepath='/path/to/file/foo.jpg')
transform = filelink.resize(width=100, height=100).rotate(deg=90)

new_filelink = transform.store()
```