You could take the tumblelog name, query the API at someuser/info . If it comes back with a response, you would know the account is primary (As above, on a primary tumblelog the tumblr name and tumblelog name will be the same).13 dic 2016
How do I hide my Tumblr account?
- Tap your account settings (the little human), then the gear icon.
- Tap “General Settings.”
- Tap to select the "Privacy" section.
- Turn off “Let others see that you're active.”