N300

I need to  find my original password and the original email address  with which I commenced my use of the netgear router. The Telstra man put this router in when my old one was giving me trouble.

I have changed my email address several  times since 2005 when I first  had everything set up for me.

Now I wish to use a tablet to see a TV series  and I am to use  my son's netflix account for access. I have to tell the tablet what the router password is and I have no idea where to start to find it. 

I'm not sure I'm even making sense as I really have no idea what I'm doing, but I thought someone might understand what I'm asking .

I do hope so.

many thanks

Chris