upaded admin api's to return preview file name
upaded admin api's to return preview file name

Nolski/yellr-server,Nolski/yellr-server,hhroc/yellr-server,thequbit/yellr-server,thequbit/yellr-server,Nolski/yellr-server,thequbit/yellr-server,hhroc/yellr-server,hhroc/yellr-server,hhroc/yellr-server,Nolski/yellr-server,thequbit/yellr-server