Subdomains Email reset with Devise

Hi Chris so im trying to work with subdomain and maindomain email reset password
I use the code on devise and for subdomain work like a charm but for the main domain I get this erro because they down have @company.subdomain
https://github.com/plataformatec/devise/wiki/How-To:-Send-emails-from-subdomains

<%= link_to 'Cambiar contraseña', edit_password_url(@resource, reset_password_token: @token, :subdomain => @resource.company.subdomain) %>

any need to use it only if reques is from a subdomain.

You'll want to probably use an if statement there to send it without the subdomain option. I know you can include helpers into the mailers so that could be a nice place to put the logic for the subdomain option.