routes.rb

Rails.application.routes.draw do
  mount API => '/api/'
  get 'welcome/index'
  root to: 'welcome#index'

  devise_for :members, path: :member, controllers: {
    registrations: 'member/members/registrations',
    sessions:      'member/members/sessions',
  }
  namespace :member do
    get 'welcome/index'
    root to: 'welcome#index'
  end

  devise_for :admins, path: :admin, controllers: {
    sessions: 'admin/admins/sessions',
  }
  namespace :admin do
    resources :members
    root to: 'members#index'
  end

  match '*path' => 'application#error404', via: :all
end