Especial delimiters caracter

running the following script

select ('cabal\\' || user_name) into temporary user_access from
tbl_user_access where access_profile_id = 4;
copy user_access to '/temp/users.txt' delimiters '|';

The result of the output file is...
domain\\users
but the field in the temp table is...
domain\users

I need the same result like temp table. How could i do it??
RGDS