Added getting started to README

README.md

@@ -1,17 +1,38 @@
-# PSTruPortal
-
-[![Donate](https://img.shields.io/badge/Donate-PayPal-green.svg)](https://paypal.me/erwindevreugd)
-
-A PowerShell module for the Interlogix TruPortal API.
-
-## Cmdlet Name Collision
-
-To avoid name collision between the cmdlet in this module and other cmdlets you can import this module with a prefix.
-
-```powershell
-Import-Module -Name PSTruPortal -Prefix TP
-```
-
-## Donation
-
+# PSTruPortal
+
+[![Donate](https://img.shields.io/badge/Donate-PayPal-green.svg)](https://paypal.me/erwindevreugd)
+
+A PowerShell module for the Interlogix TruPortal API.
+
+## Cmdlet Name Collision
+
+To avoid name collision between the cmdlet in this module and other cmdlets you can import this module with a prefix.
+
+```powershell
+Import-Module -Name PSTruPortal -Prefix TP
+```
+
+## Getting Started
+
+### Getting a Session Key
+
+Before you can send commands to the TruPortal you need to get a session key. 
+You can save than save the session key to the script context so subsequent commands will be able to use the session key as long as the key is valid.
+
+```powershell
+Invoke-LoginUser -Host 192.168.1.1 -Username user -Password 1234 | Set-ScriptContext
+```
+
+To signout a session key that is saved to the script context you can retrieve the key and pipe it to the logout cmdlet.
+
+```powershell
+Get-SessionKeyFromScriptContext | Invoke-LogoutUser
+```
+
+## Trademark Acknowledgements
+
+* Interlogix and TruPortal are registered trademarks of Interlogix United Technologies.
+
+## Donation
+
 [![Donate](https://img.shields.io/badge/Donate-PayPal-green.svg)](https://paypal.me/erwindevreugd)