From the introduction of devise to the creation of the users table

gem 'devise'

% bundle install

Reboot the server
% rails s

Install devise config file in rails application
	
% rails g devise:install

	
% rails g devise user

#Omission
create    db/migrate/20200523092621_devise_create_users.rb
create    app/models/user.rb

class DeviseCreateUsers < ActiveRecord::Migration[6.0]
  def change
    create_table :users do |t|
      ## Database authenticatable
      t.string :name,               null: false
      t.string :email,              null: false, default: ""
      t.string :encrypted_password, null: false, default: ""

      #~abridgement~
    end

% rails db:migrate

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