Create a separate file that has the user name as the first line and the password as the second line. That should be the only contents of the file. Then put the full path to that file after auth-user-pass in the main config.
Create a separate file that has the user name as the first line and the password as the second line. That should be the only contents of the file. Then put the full path to that file after auth-user-pass in the main config.