That's because bulkloader doesn't support OAuth2, and likely won't. I'm sure it's deprecated – Google has certainly removed all documentation about it.
You can try to change your account to still allow password-based authentication. https://support.google.com/accounts/answer/6010255?hl=en Alternatively, try gcloud-python to upload to the datastore manually. https://googlecloudplatform.github.io/gcloud-python/ -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/f245758a-89ac-4e89-b721-91cc6c254863%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
