(AP) – Disney says its new Disney Plus streaming service doesn’t have a security breach, but some users have been shut out after hackers tried to break into their accounts.

The news site ZDNet found stolen account usernames and passwords selling for $3 on underground hacking forums. Disney’s streaming service costs $7 a month or $70 a year.

Disney Plus comes as Disney and other traditional media companies seek to siphon the subscription revenue now going to Netflix and other streaming giants. Disney is hoping to attract millions of subscribers with its mix of Marvel and Star Wars movies and shows, classic animated films and new series.

Helped by promotions, including a free year for some Verizon customers, the new service attracted 10 million subscribers the day it launched last week.