Pass value/metadata to extra columns

[chhaysotheara]

Environment

• TypeORM version: 9.0.0
• Database: PostgreSQL
• Does Entity inherit from TypeORM.BaseEntity: Yes

Describe the bug It's actually not a bug, more of a question. Is it possible to have modified_by (user) as an extra column? I need help figuring out how to pass the authenticated user through.

Thanks for the effort for this package.

[clintonb]

This is a duplicate of #11.