Just ssh to the controller and use the following commands to change it - here a example for WLAN Service ABCDEF.....
- ssh to the controller
# wlans
# ABCDEF
# priv
# psk abcdefghijklmnop
# apply
If you've the skills to write a script to do that... why not.
-Ron
![aec7074ea3284a698f035bb7ccf1b6ae_RackMultipart20151027-10752-1oix09y-EWC_CLI_PSK_inline.png aec7074ea3284a698f035bb7ccf1b6ae_RackMultipart20151027-10752-1oix09y-EWC_CLI_PSK_inline.png](/t5/image/serverpage/image-id/3756iE4272B1031B67916/image-size/large?v=v2&px=999)