class DeviseTokenAuth::ConfirmationsController

def show
  @resource = resource_class.confirm_by_token(params[:confirmation_token])
  if @resource and @resource.id
    # create client id
    client_id  = SecureRandom.urlsafe_base64(nil, false)
    token      = SecureRandom.urlsafe_base64(nil, false)
    token_hash = BCrypt::Password.create(token)
    expiry     = (Time.now + DeviseTokenAuth.token_lifespan).to_i
    @resource.tokens[client_id] = {
      token:  token_hash,
      expiry: expiry
    }
    @resource.save!
    redirect_to(@resource.build_auth_url(params[:redirect_url], {
      token:                        token,
      client_id:                    client_id,
      account_confirmation_success: true,
      config:                       params[:config]
    }))
  else
    raise ActionController::RoutingError.new('Not Found')
  end
end