I have set 2 repositories in AWS Codecommit and using before SourceTree from Windows, setting up access via HTTP protocol was and everything was working fine.
Right not I am migrating the development of a project on a machine where I do have installed ubuntu and where I choose to use gitkraken.
I was able to git clone in a folder where my user has read and write access(my user) via Terminal, so isn't permission related in Ubuntu, where after git clone "aws repo url" I was prompt asking for the username for the IAM and password(the one created at AWS IAM console).
I can of course open that repo folder from gitkraken and see even all the remote branch and all the history, but once I do for example pull from gitkraken it failed as "access" denied. I cannot also clone the same or another repo from Gitkraken. So seems I do have to configure my credentials in gitkraken but not sure where that should be done. This official doc does not say much.