Improved bot login flow with optional password auth

bot/bot.js

@@ -17,7 +17,6 @@ class Bot {
         logger.info("Creating Matrix Client")
         this.client = sdk.createClient({
             baseUrl: this.config.baseUrl,
-            accessToken: this.config.accessToken,
             userId: this.config.userId
         });
 
@@ -60,8 +59,39 @@ class Bot {
     async connect() {
         // logger.info("Initializing Crypto");
         // await bot.client.initCrypto();
-        logger.info("Starting Matrix SDK Client");
-        await this.client.startClient();
+        let botClient = this.client;
+        let botConfig = this.config;
+
+        let startServerConnection = async () => {
+            logger.info("Starting Matrix SDK Client");
+            await this.client.startClient();
+        } 
+
+        let connectWithPassword = (err, data) => {
+            if (err === null) {
+                logger.info("Successfully authenticated with password %o", data);
+                startServerConnection();
+            } else {
+                logger.error("Failed to authenticate with password %o", err);
+            }
+        }
+
+        let connectWithToken = (err, data) => {
+            if (err === null) {
+                logger.info("Successfully authenticated with access token %o", data);
+                startServerConnection();
+            } else {
+                logger.error("Failed to authenticate with access token %o", err);
+                if (typeof botConfig.userPassword !== 'undefined') {
+                    botClient.loginWithPassword(botConfig.userId, botConfig.userPassword, connectWithPassword);
+                } else {
+                    logger.error("No fallback password provided!");
+                }
+            }
+        }
+
+        logger.info("Authenticating With Server");
+        botClient.loginWithToken(this.config.accessToken, connectWithToken);
     }
 
     sendStatusStartup() {