wp ithemes-licensing activate [<product>...] [--ithemes-user=<user>] [--ithemes-pass=<pass>]

Example
wp ithemes-licensing activate ithemes-security-pro --ithemes-user=doctorstrange --ithemes-pass='vethu2Eswi_Hu*+lyuwr'
Success: Activated the product license for ithemes-security-pro.