Use Omniauthable user model with admin role

db/migrate/20190203145552_devise_create_users.rb

@@ -0,0 +1,53 @@
+# frozen_string_literal: true
+
+class DeviseCreateUsers < ActiveRecord::Migration[5.2]
+  def change
+    create_table :users do |t|
+      ## OmniAuth-able
+      t.string :provider, null: false
+      t.string :uid, null: false
+
+      ## User role
+      t.integer :role, default: 0
+
+      ## Rememberable
+      t.datetime :remember_created_at
+
+
+      ## Database authenticatable
+      # t.string :email,              null: false, default: ""
+      # t.string :encrypted_password, null: false, default: ""
+
+      ## Recoverable
+      # t.string   :reset_password_token
+      # t.datetime :reset_password_sent_at
+
+
+      ## Trackable
+      # t.integer  :sign_in_count, default: 0, null: false
+      # t.datetime :current_sign_in_at
+      # t.datetime :last_sign_in_at
+      # t.string   :current_sign_in_ip
+      # t.string   :last_sign_in_ip
+
+      ## Confirmable
+      # t.string   :confirmation_token
+      # t.datetime :confirmed_at
+      # t.datetime :confirmation_sent_at
+      # t.string   :unconfirmed_email # Only if using reconfirmable
+
+      ## Lockable
+      # t.integer  :failed_attempts, default: 0, null: false # Only if lock strategy is :failed_attempts
+      # t.string   :unlock_token # Only if unlock strategy is :email or :both
+      # t.datetime :locked_at
+
+
+      t.timestamps null: false
+    end
+
+    # add_index :users, :email,                unique: true
+    # add_index :users, :reset_password_token, unique: true
+    # add_index :users, :confirmation_token,   unique: true
+    # add_index :users, :unlock_token,         unique: true
+  end
+end

db/migrate/20190203150923_add_name_to_users.rb

@@ -0,0 +1,5 @@
+class AddNameToUsers < ActiveRecord::Migration[5.2]
+  def change
+    add_column :users, :name, :string
+  end
+end

db/migrate/20190203164629_drop_admins.rb

@@ -0,0 +1,8 @@
+class DropAdmins < ActiveRecord::Migration[5.2]
+  def up
+    drop_table :admins
+  end
+  def down
+    fail ActiveRecord::IrreversibleMigration
+  end
+end

db/schema.rb

@@ -10,24 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2019_02_02_113250) do
-
-  create_table "admins", force: :cascade do |t|
-    t.string "email", default: "", null: false
-    t.string "encrypted_password", default: "", null: false
-    t.string "reset_password_token"
-    t.datetime "reset_password_sent_at"
-    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.string "current_sign_in_ip"
-    t.string "last_sign_in_ip"
-    t.datetime "created_at"
-    t.datetime "updated_at"
-    t.index ["email"], name: "index_admins_on_email", unique: true
-    t.index ["reset_password_token"], name: "index_admins_on_reset_password_token", unique: true
-  end
+ActiveRecord::Schema.define(version: 2019_02_03_164629) do
 
   create_table "problems", force: :cascade do |t|
     t.datetime "created_at"
@@ -46,4 +29,14 @@ ActiveRecord::Schema.define(version: 2019_02_02_113250) do
     t.index ["problem_id"], name: "index_translations_on_problem_id"
   end
 
+  create_table "users", force: :cascade do |t|
+    t.string "provider", null: false
+    t.string "uid", null: false
+    t.integer "role", default: 0
+    t.datetime "remember_created_at"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.string "name"
+  end
+
 end