def component_password(domain)
      host = @vhosts.values.find {|host| host.component?(domain) }
      host.password(domain) if host
    end
def component_password(domain)
      host = @vhosts.values.find {|host| host.component?(domain) }
      host.password(domain) if host
    end
Return the password for the component or nil if it's not hosted here.