Revert "Added email column to database structure"

This reverts commit 4a88f4a1ac6e061be00a4dc0cf312cb3b3bfb0a2.
Revert "Revert "Added email column to database structure""

This reverts commit d7801308a59f71d1326d7aac955e5f50d743d8ef.
Revert "Added email column to database structure"

This reverts commit e51bb6dfb098fff97ed618d2ac795af24bf55ec2.