Allow to store default repository user and password

When Bamboo is migrated to a new host, the cached usernames and passwords for each project are wiped out, and you need to re-add the username/password to each project.
Considering that you can have a lot of projects in Bamboo, it could take a while to do this.

So, it would be great if it was possible to store somewhere a default repository user and password and configure the projects to use this stored credential.