actually just after posting the post i found that file you mentioned /programdata/config/livetv.xml and i saved a copy of the file then put the new password in on the emby dashboard went back to the file in emby programdata folder found the entry for the password copied it and pasted it into the right place in the saved copy of the file (in my case three times in the file ) then coped the file back to /programdata/config/ folder to over right the one in there and it work fine.
of course before doing all this i saved/backup the Emby server folders
the entry i change is highlighted in Red
PS: what you see here is the real format for the password but not my password or username i mixed up all the password letters and numbers and changed the user name
thank you for your help