m3u8 authentication failed

I am facing M3U8 authentication failed while playing  the video.

we are using content secure policy in our videos, due to that we are call authentication api  while playing M3U8 videos , in that authentication api we need to set custom header  to allow the authentication, how to find the authentication api while  m3u8 videos getting initialised in the player , is there is any listeners or event in the player to detect the authentication api to set custom headers. please help us to sort out the problem ,thanks in advance