diff --git a/doc/InstanceToken.md b/doc/InstanceToken.md
index 5a55532..7a9c0ee 100644
--- a/doc/InstanceToken.md
+++ b/doc/InstanceToken.md
@@ -4,7 +4,22 @@
 
 # Generate `dls_instance_token.tok`
 
-t.b.a.
+- Generated by `https://<base-url>/service_instance_manager/v1/service-instance/identity-token`
+- Using binary `service_instance_token_manager.cpython-312-x86_64-linux-gnu.so` file 
+- 
+<details>
+    <summary>`service_instance_token_manager_controller.py`</summary>
+
+```python
+# from "service_instance_token_manager.cpython-312-x86_64-linux-gnu.so"
+_serviceInstanceTokenManager = ServiceInstanceTokenManager()
+
+# ...
+data = _serviceInstanceTokenManager.siit_get(event_args)
+```
+
+</details>
+
 
 # Load and Parse `liense.bin`