added AuthenticationToken model, updated some restrictions for the authentication token table, added dependent destroy to the user model for authentication tokens

db/migrate/20220721131946_create_authentication_tokens.rb

@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+class CreateAuthenticationTokens < ActiveRecord::Migration[6.1]
+  def change
+    create_table :authentication_tokens, id: :uuid do |t|
+      t.string :shared_secret, null: false, index: {unique: true}
+      t.references :user, polymorphic: true, null: false
+      t.date :expire_at, null: false
+      t.timestamps
+    end
+  end
+end