From SVN 1.8 the default for the interactive behavior has been changed:
--non-interactive : do no interactive prompting (default is to prompt
only if standard input is a terminal device)
--force-interactive : do interactive prompting even if standard input
is not a terminal device
So when you don't have a stored auth+password locally, mr.developer is not asking for username+password anymore.
If should add the --force-interactive someway.