I use aw_api_php_lib_2.2.0 for php.
That's my auth.ini file.
email = "
mym...@yahoo.de"
password = "mypassword"
userAgent = "SEO Sniffer"
applicationToken = "INSERT_APPLICATION_TOKEN_HERE"
developerToken = "mydevelopertoken"
; Uncomment to make requests against a client account.
;clientId = "
mym...@yahoo.de"