Only output json for the channel created_by user if it really exists.
Only output json for the channel created_by user if it really exists.

Factlink/factlink-core,daukantas/factlink-core,Factlink/factlink-core,Factlink/factlink-core,daukantas/factlink-core,daukantas/factlink-core,Factlink/factlink-core,daukantas/factlink-core