fix: exception when change your config.delegate to other name, you will get an TypeError (#84)

Co-authored-by: Yiyu He <[email protected]>

Author: bianchui

lib/loader.js

@@ -133,7 +133,7 @@ module.exports = app => {
     try {
       await database.authenticate();
     } catch (e) {
-      if (app.model[AUTH_RETRIES] >= 3) throw e;
+      if (database[AUTH_RETRIES] >= 3) throw e;
 
       // sleep 1s to retry, max 3 times
       database[AUTH_RETRIES] += 1;