update README.md.

README.md

@@ -91,6 +91,10 @@ pulsar:
   broker: pulsar://pulsar broker地址:6650
   service: http://pulsar 服务地址:8080
 
+#认证中心地址
+oauth2:
+  auth-server-url: http://127.0.0.1:8086
+  
 
 ```