Bitbucket: Who is the mystery author?

[zsolt_bitbucket]

We have a git private repository, I have defined a group, who's members can access this repository.

Within git, there are no rules about defining who you are.  You can make up an email or username but, when you push, a change, you have to be a credentialed bitbucket user. 

My question is,  if someone has a generic name like root or admin when they check-in code, is there any way to determine the credentialed bit bucket user associated with that push?  I have looked long and hard and cannot find a solution on the web.

[Aron Gombas _Midori_]

I do not think you can map OS-level usernames to Bitbucket usernames using some configurable mapping. And even if it was possible, I think this would not be a very good practice, as another level of abstraction may complicate your life.

Why don't you force using the Bitbucket username as Git committer name? 

(You could even use the Commit Policy for Bitbucket app to enforce this.)