Converted login to promise based resolution

* Added error handling to room message sending on startup

bot/bot.js

@@ -64,38 +64,45 @@ class Bot {
         let botClient = this.client;
         let botConfig = this.config;
 
-        let startServerConnection = async () => {
+        let startServerConnection = () => {
             logger.info("Starting Matrix SDK Client");
-            await this.client.startClient({
+            return this.client.startClient({
                 initialSyncLimit: 0
             });
         }
 
-        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("Authenticating With Server");
+        if (typeof botConfig.accessToken !== 'undefined') {
+            await botClient.loginWithToken(this.config.accessToken)
+            .then((data) => {
                 logger.info("Successfully authenticated with access token %o", data);
-                startServerConnection();
-            } else {
+                return startServerConnection();
+            }, (err) => {
                 logger.error("Failed to authenticate with access token %o", err);
                 if (typeof botConfig.userPassword !== 'undefined') {
-                    botClient.loginWithPassword(botConfig.userId, botConfig.userPassword, connectWithPassword);
+                    return botClient.loginWithPassword(botConfig.userId, botConfig.userPassword)
+                    .then((data) => {
+                        logger.info("Successfully authenticated with password %o", data);
+                        return startServerConnection();
+                    }, (err) => {
+                        logger.error("Failed to authenticate with password %o", err);
+                    });
                 } else {
                     logger.error("No fallback password provided!");
                 }
-            }
+            });
+        } else if (typeof botConfig.userPassword !== 'undefined') {
+            await botClient.loginWithPassword(botConfig.userId, botConfig.userPassword)
+            .then((data) => {
+                logger.info("Successfully authenticated with password %o", data);
+                return startServerConnection();
+            }, (err) => {
+                logger.error("Failed to authenticate with password %o", err);
+            });
+        } else {
+            logger.error("No authentication credentials available!");
+            process.exit(1);
         }
-
-        logger.info("Authenticating With Server");
-        botClient.loginWithToken(this.config.accessToken, connectWithToken);
     }
 
     updateAvatar(avatarFile, overwrite = false) {
@@ -143,6 +150,8 @@ class Bot {
                     roomId, message.createBasic("Started with version: " + this.buildInfo, message.types.NOTICE)
                 ).then(() => {
                     logger.debug("Notified %s of startup", roomId);
+                }, (err) => {
+                    logger.error("Unable to send message to room %s because %s", roomId, err.errcode);
                 }));
             });
         } else {