code: def verify(ctx, file, account):
      
      if not file:
          print_message("Prompting for message. Terminate with CTRL-D", "info")
          file = click.get_text_stream("stdin")
      m = Message(file.read(), bitshares_instance=ctx.bitshares)
      try:
          if m.verify():
              print_message("Verified", "success")
          else:
              print_message("not verified", "error")
      except InvalidMessageSignature:
          print_message("Signature INVALID!", "error")
docs: Verify a signed message