The Battlefront beta for PC, Xbox One and PS4 is open to all from the 6th of October but until then you need a code obtained from preordering before 10/1 to access it. Instead of filling the actual OT up with begging posts I thought this thread could be used to share or ask for codes. It helps to specify the platform and region in which you want a code for.
Proper Beta OT here
Proper Beta OT here