Add README section about client store configuration.

README.md

@@ -9,6 +9,7 @@ Can be run as a XMPP client or XMPP component.
 
  * [go-xmpp](https://git.kingpenguin.tk/chteufleur/go-xmpp) for the XMPP part.
  * [cfg](https://github.com/jimlawless/cfg) for the configuration file.
+ * [oauth2.v3](https://github.com/go-oauth2/oauth2) for OAuth2 support.
 
 ### Build and run
 
@@ -52,6 +53,9 @@ If ``http_bind_address_ipv4`` is set to ``0.0.0.0``, it will bind all address on
 The lang messages file must be placed into the same directory than the configuration file.
 An example of this file can be found in [the repos](https://git.kingpenguin.tk/chteufleur/HTTPAuthentificationOverXMPP/src/master/messages.lang)
 
+### OAuth configuration
+OAuth configuration is made by a file that can be found in [the repos](https://git.kingpenguin.tk/chteufleur/HTTPAuthentificationOverXMPP/src/oauth/clientStore.json) and must be place following [XDG specification](https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html) (example ``/etc/xdg/http-auth/clientStore.json``).
+
 ### Usage
 To ask authorization, just send an HTTP request to the path ``/auth`` with parameters:
  * __jid__ : JID of the user (user@host/resource or user@host)

clientStore.json

@@ -0,0 +1,7 @@
+[
+    {
+        "ID": "key",
+        "Secret": "secret",
+        "Domain": "http://localhost:9094"
+    }
+]