def amplify!(user)
      user.portals << @portal unless user.portals.include?(@portal)
      user.default_portal = @portal unless user.default_portal
      user
    end
def amplify!(user)
      user.portals << @portal unless user.portals.include?(@portal)
      user.default_portal = @portal unless user.default_portal
      user
    end
Adds the configured portal to the user if necessary.

 @return [Aker::User]