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

app/models/authentication_token.rb

@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+require 'securerandom'
+
+class AuthenticationToken < ApplicationRecord
+  include Creation
+  def self.generate!(user)
+    create!(
+      shared_secret: SecureRandom.hex(32),
+      user: user,
+      expire_at: 7.days.from_now
+    )
+  end
+end

app/models/user.rb

@@ -6,6 +6,7 @@ class User < ApplicationRecord
   ROLES = %w[admin teacher learner].freeze
 
   belongs_to :consumer
+  has_many :authentication_token, dependent: :destroy
   has_many :study_group_memberships, as: :user
   has_many :study_groups, through: :study_group_memberships, as: :user
   has_many :exercises, as: :user

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

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2022_04_15_215112) do
+ActiveRecord::Schema.define(version: 2022_07_21_131946) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "pg_trgm"
@@ -30,6 +30,17 @@ ActiveRecord::Schema.define(version: 2022_04_15_215112) do
     t.index ["user_type", "user_id"], name: "index_anomaly_notifications_on_user"
   end
 
+  create_table "authentication_tokens", id: :uuid, default: -> { "gen_random_uuid()" }, force: :cascade do |t|
+    t.string "shared_secret", null: false
+    t.string "user_type", null: false
+    t.bigint "user_id", null: false
+    t.date "expire_at", null: false
+    t.datetime "created_at", precision: 6, null: false
+    t.datetime "updated_at", precision: 6, null: false
+    t.index ["shared_secret"], name: "index_authentication_tokens_on_shared_secret", unique: true
+    t.index ["user_type", "user_id"], name: "index_authentication_tokens_on_user"
+  end
+
   create_table "codeharbor_links", id: :serial, force: :cascade do |t|
     t.string "api_key"
     t.datetime "created_at"