A Unity ID allows you to buy and/or subscribe to Unity products and services, shop in the Asset Store and participate in the Unity community.
Separate names with a comma.
I have been having this issue... http://answers.unity3d.com/questions/1172153/multiple-xbox-controllers-trigger-axis-always-retu.html In addition...
Things get a little bananas if you try to use a mixture of wired 360 controllers and wireless Xbox One controllers connected via wireless adapter....