Adding Cleartext-Password for EAP requests (new module development)

Hello, I am trying to develop a freeradius module for authorization with OpenIAM and the module works fine with PAP and EAP-TTLS with PAP. Is there a way to decode the EAP packet and access the User-Password attributes within the mod_authorize method of my module or using an unlang policy? Currently, EAP-TTLS wth PAP only woks because when the request is tunneled eap_ttls copy all attributes but with MS-CHAP and others are not working due to missing Cleartext-Password. Thank you, Suneth.