doc: amend readme on how to use

.github/README.template.md

@@ -8,6 +8,23 @@ composer require cedricziel/baserow
 
 ## Docs
 
+```php
+use CedricZiel\Baserow\Generated\Client;
+
+$baserow = Client::create(null, [
+    // optional, default is baserow.io
+    new AddHostPlugin(new Uri('https://my-baserow.example.com')),
+
+    // use ONE of DatabaseTokenAuthentication
+    new DatabaseTokenAuthentication('YOUR_TOKEN'),
+    //  OR JWTAuthentication
+    new JWTAuthentication('JWT Token'),
+]);
+
+// list all rows in table id 42
+$client->listDatabaseTableRows(42);
+```
+
 ### docs ###
 
 ## License