Readme: add instructions for using access tokens
Change-Id: Id631ecd11e4c9d2130fc12be5d727f4a562139e3
diff --git a/Readme.md b/Readme.md
index 2e09bc4..4f0dbe9 100644
--- a/Readme.md
+++ b/Readme.md
@@ -88,6 +88,20 @@
|[in Marsch setzen](https://korap.ids-mannheim.de/?q=Marsch%20focus%28in%20%5btt%2fp%3dNN%5d%20%7b%5btt%2fl%3dsetzen%5d%7d%29&ql=poliqarp) | 6.87| 9.27| 22041.63|
|[in Klammern setzen](https://korap.ids-mannheim.de/?q=Klammern%20focus%28in%20%5btt%2fp%3dNN%5d%20%7b%5btt%2fl%3dsetzen%5d%7d%29&ql=poliqarp) | 6.55| 10.08| 15643.27|
+### Access restricted KWICs
+In order to perform the collocation analysis and other textual queries also on corpus parts where KWIC access requires a login, you need to authorize your application via an access token.
+
+In the case of DeReKo, you cat get an access token from [KorAP OAuth settings here](https://korap.ids-mannheim.de/settings/oauth#page-top). There login, register a new client application, create a new token, copy it and in R use it via the `accessToken` parameter:
+
+```
+kco <- new("KorAPConnection", accessToken="<access token>")
+```
+
+You can also persist the access token for subsequent sessions with the `persistAccessToken` function:
+```
+persistAccessToken(kco)
+```
+
## Demos