Add authentication

db/migrate/20250611155736_create_users.rb

@@ -0,0 +1,12 @@
+class CreateUsers < ActiveRecord::Migration[8.0]
+  def change
+    create_table :users do |t|
+      t.string :name, null: false
+      t.string :email_address, null: false
+      t.string :password_digest, null: false
+
+      t.timestamps
+    end
+    add_index :users, :email_address, unique: true
+  end
+end

db/migrate/20250611155737_create_sessions.rb

@@ -0,0 +1,11 @@
+class CreateSessions < ActiveRecord::Migration[8.0]
+  def change
+    create_table :sessions do |t|
+      t.references :user, null: false, foreign_key: true
+      t.string :ip_address
+      t.string :user_agent
+
+      t.timestamps
+    end
+  end
+end