feat: Unify user and super admin credentials (#3830)

Fixes: #3061, #3489

db/migrate/20220121055444_add_type_to_users.rb

@@ -0,0 +1,42 @@
+class AddTypeToUsers < ActiveRecord::Migration[6.1]
+  def change
+    add_column :users, :type, :string
+    migrate_existing_super_admins
+
+    drop_table :super_admins do |t|
+      t.string :email,              null: false, default: ''
+      t.string :encrypted_password, null: false, default: ''
+      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.timestamps null: false
+    end
+  end
+
+  private
+
+  def old_super_admins
+    ActiveRecord::Base.connection.execute('SELECT * from super_admins').to_a
+  end
+
+  def create_user_account_for_super_admin(super_admin)
+    u = User.new(email: super_admin['email'], name: "SuperUser #{super_admin['id']}", encrypted_password: super_admin['encrypted_password'],
+                 confirmed_at: DateTime.now, type: 'SuperAdmin')
+    u.save(validate: false)
+  end
+
+  def migrate_existing_super_admins
+    old_super_admins.each do |super_admin|
+      user = User.find_by(email: super_admin['email'])
+      if user.present?
+        user.update(type: 'SuperAdmin')
+      else
+        Rails.logger.debug { "User with email #{super_admin['email']} not found" }
+        create_user_account_for_super_admin(super_admin)
+      end
+    end
+  end
+end