Feature: Introduce Super Admins (#705)

* Feature: Introduce Super Admins

- added new devise model for super user
- added administrate gem
- sample dashboards for users and accounts

Co-authored-by: Pranav Raj Sreepuram <pranavrajs@gmail.com>

db/migrate/20200410145519_devise_create_super_admins.rb

@@ -0,0 +1,45 @@
+# frozen_string_literal: true
+
+class DeviseCreateSuperAdmins < ActiveRecord::Migration[6.0]
+  def change
+    return if ActiveRecord::Base.connection.table_exists? 'super_admins'
+
+    create_table :super_admins do |t|
+      ## Database authenticatable
+      t.string :email,              null: false, default: ''
+      t.string :encrypted_password, null: false, default: ''
+
+      ## Recoverable
+      # t.string   :reset_password_token
+      # t.datetime :reset_password_sent_at
+
+      ## Rememberable
+      t.datetime :remember_created_at
+
+      ## Trackable
+      t.integer  :sign_in_count, default: 0, null: false
+      t.datetime :current_sign_in_at
+      t.datetime :last_sign_in_at
+      t.inet     :current_sign_in_ip
+      t.inet     :last_sign_in_ip
+
+      ## Confirmable
+      # t.string   :confirmation_token
+      # t.datetime :confirmed_at
+      # t.datetime :confirmation_sent_at
+      # t.string   :unconfirmed_email # Only if using reconfirmable
+
+      ## Lockable
+      # t.integer  :failed_attempts, default: 0, null: false # Only if lock strategy is :failed_attempts
+      # t.string   :unlock_token # Only if unlock strategy is :email or :both
+      # t.datetime :locked_at
+
+      t.timestamps null: false
+    end
+
+    add_index :super_admins, :email, unique: true
+    # add_index :super_admins, :reset_password_token, unique: true
+    # add_index :super_admins, :confirmation_token,   unique: true
+    # add_index :super_admins, :unlock_token,         unique: true
+  end
+end

db/schema.rb

@@ -327,6 +327,20 @@ ActiveRecord::Schema.define(version: 2020_05_10_112339) do
     t.boolean "payment_source_added", default: false
   end
 
+  create_table "super_admins", force: :cascade do |t|
+    t.string "email", default: "", null: false
+    t.string "encrypted_password", default: "", null: false
+    t.datetime "remember_created_at"
+    t.integer "sign_in_count", default: 0, null: false
+    t.datetime "current_sign_in_at"
+    t.datetime "last_sign_in_at"
+    t.inet "current_sign_in_ip"
+    t.inet "last_sign_in_ip"
+    t.datetime "created_at", precision: 6, null: false
+    t.datetime "updated_at", precision: 6, null: false
+    t.index ["email"], name: "index_super_admins_on_email", unique: true
+  end
+
   create_table "taggings", id: :serial, force: :cascade do |t|
     t.integer "tag_id"
     t.string "taggable_type"