user validation

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: 2021_03_21_093857) do
+ActiveRecord::Schema.define(version: 2021_03_21_135711) do
 
   create_table "authors", force: :cascade do |t|
     t.string "first_name"
@@ -44,6 +44,7 @@ ActiveRecord::Schema.define(version: 2021_03_21_093857) do
     t.datetime "created_at", precision: 6, null: false
     t.datetime "updated_at", precision: 6, null: false
     t.string "recovery_password_digest"
+    t.integer "role"
   end
 
 end