این خط ها رو بهش اضافه کرده ام
auth_param basic program /usr/local/squid/libexec/squid_radius_auth -f /usr/local/squid/etc/squid_radius_auth.conf
auth_param basic children 5
auth_param basic realm DarkLove*****Access
auth_param basic credentialsttl 2 hours
auth_param basic casesensitive on
acl AuthUsers *****_auth REQUIRED
http_access allow AuthUsers