Added comments

signin.js

@@ -32,6 +32,26 @@ class SignInEventArgs
 
 class Signin extends EventEmitter
 {
+	/** Conf structure
+	 * {
+	 *   "spec": process.env.OPENID_SPEC_URI
+	 *   , "authorization_endpoint_params": {
+	 *     "client_id": process.env.AZURE_AD_CLIENT_ID
+	 *     , "redirect_url": `https://${HOST_NAME}/user/login/`
+	 *     , "nonce": "{RANDSTR}"
+	 *     , "state": "{RANDSTR}"
+	 *     , "scope": "openid profile email"
+	 *     , "response_mode": "form_post"
+	 *     , "response_type": "id_token"
+	 *   }
+	 *   , "end_session_endpoint_params": {
+	 *   "post_logout_redirect_uri": `https://${HOST_NAME}/user/logout/`
+	 * }
+	 *
+	 * NOTE:
+	 *   set Signin().RANDSTR = () => SecureRandStr(); to enable custom templated functions
+	 *   * Only support "^{FUNCTION_NAME}$" for now
+	 **/
 	constructor( conf )
 	{
 		super();