Definitely post questions here and not on StackOverflow, everybody’s here, and I don’t post there either.
I’m not a bitbucket user (others in community land contributed the module), but I would assume the problem is you are not supplying the password when you are cloning the repo?
I have this issue too. I use SSH repo access, and I think that Ansible just hangs on this:
The authenticity of host '[bitbucket.org](http://bitbucket.org) (131.103.20.167)' can't be established. RSA key fingerprint is 97:8c:1b:f2:6f:14:6b:5c:3b:ec:aa:46:46:74:7c:40. Are you sure you want to continue connecting (yes/no)?