ADd example

README.md

@@ -9,7 +9,30 @@
 
 Crea facilmente boleta de honorarios
 
-## Installation
+## Instalación
 ```bash
 npm i -S sii
 ```
+
+## Uso
+```javascript
+import sii from 'sii';
+
+const user = {
+  rut: '11.111.111-1',
+  password: '0123456789'
+};
+const work = {
+  description: 'AMAZING WORK',
+  value: 555556
+};
+const destinatary = {
+  rut: 22222222,
+  dv: '2',
+  name: 'AMAZING COMPANY',
+  address: 'STREET 1'
+};
+const zone = 13;
+const commune = 15103;
+sii.byDestinatary(user, work, destinatary, zone, commune).then(() => console.log('Done'))
+```