For documentation see the next link: https://drive.google.com/file/d/16GW2MxLDQABVBug_8iJs7BBBwpxZKp8a/view?usp=sharing
For instructions how to write api's: https://drive.google.com/file/d/18z8WjNODS5MHqK4nKeHCxUn3qvVcjMZo/view?usp=sharing