Add ability to specify Password Field as job Variable in File Iterator

The use case is I have 10 SFTP sites. I have the SFTP login password stored in the AWS secret manager for each of the sites. Therefore, I want to have a job variable which will have the Matillion secret name stored in it. And use that variable in Password field of File Iterator. The feature is available in Data Transfer and same can be replicated in File Iterator. This way I can use a single File Iterator for each of the FTP sites, currently I have to create one for each of them.