[#103] Alphanumeric and punctuation channel name validation
closes #103 (closed)
As it was mentioned in the MR https://gitlab.cern.ch/push-notifications/backend/-/merge_requests/92, maybe I forgot to add any other special character.
Also, Emmanuel mentioned the fact of trimming the final spaces and get rid of the ending whitespace validation. Any suggestion?
Edited by Caetan Tojeiro Carpente