Update 'README.md'

README.md

@@ -355,4 +355,10 @@ https://azp.tld/.well-known/oauth3/callback.html#/
   &debug=false
 ```
 
-## OAuth3 Token Issuance, Endpoints, and Process
+## OAuth3 Logout
+
+OAuth3 sessions are stored on the client. In order to log out of an application the `logout` URL specified in the directives must be opened and then it is up to the issuer to determine how to log out.
+
+```
+https://smithfam.net/#/logout
+```