[refine]设置默认密码

Config/setting.py

@@ -24,11 +24,11 @@ DB_TYPE = getenv('db_type', 'SSDB')
 if DB_TYPE == 'SSDB':
     DB_HOST = getenv('ssdb_host', '127.0.0.1')
     DB_PORT = getenv('ssdb_port', '6379')
-    DB_PASSWORD = getenv('ssdb_password', '6379')
+    DB_PASSWORD = getenv('ssdb_password', '')
 elif DB_TYPE == 'MONGODB':
     DB_HOST = getenv('mongodb_host', '127.0.0.1')
     DB_PORT = getenv('mongodb_host', '27017')
-    DB_PASSWORD = getenv('mongodb_password', '6379')
+    DB_PASSWORD = getenv('mongodb_password', '')
 else:
     raise ConfigError('Unknown database type, your environment variable `db_type` should be one of SSDB/MONGODB.')