Does migration work only for default DbGroups?

Hi,

I am using Version 4.1.8. I create a migration script for a database a migration script for database with group as "sqlite3"  as follows:

Code:

php spark make:migration --dbgroup "sqlite3"

When i run spark migration it gives me the following error:

Code:

Unable to connect to the database.
Main connection [MySQLi]: Access denied for user ''@'localhost' (using password: NO)

But when i set the group as "default" it work fine. Does this mean that migration scripts will only work with "default" groups? Please help.