Adding config for session expire and refresh

config.json

@@ -10,5 +10,7 @@
 	"filespath": "./files",
     "telemetry": true,
     "webhook_update": [],
-    "secret": "this-is-a-secret-string"
+    "secret": "this-is-a-secret-string",
+    "session_expire_time": 2592000,
+    "session_refresh_time": 18000
 }

webapp/src/octoClient.ts

@@ -51,7 +51,7 @@ class OctoClient {
         return false
     }
 
-    headers() {
+    private headers() {
         return {
             Accept: 'application/json',
             'Content-Type': 'application/json',