Rails deviseでnameフィールド（名前入力の項目）を追加したい。

Rails deviseを使ってログイン画面を作っています。
既存のにusernameを追加しようと思いました。
DBにカラムを作り、フォームを作り、strong parameters の設定をしました。
しかし、名前を入力しても適用されません。

new.html.erb

<h2>Sign up</h2>

<%= form_for(resource, as: resource_name, url: registration_path(resource_name)) do |f| %>
  <%= render "devise/shared/error_messages", resource: resource %>

  <div class="field">
    <%= f.label :username  %><br />
    <%= f.text_field  :username  %>
  </div>
  
  <div class="field">
    <%= f.label :email %><br />
    <%= f.email_field :email, autofocus: true, autocomplete: "email" %>
  </div>

  <div class="field">
    <%= f.label :password %>
    <% if @minimum_password_length %>
    <em>(<%= @minimum_password_length %> characters minimum)</em>
    <% end %><br />
    <%= f.password_field :password, autocomplete: "new-password" %>
  </div>

  <div class="field">
    <%= f.label :password_confirmation %><br />
    <%= f.password_field :password_confirmation, autocomplete: "new-password" %>
  </div>

  <div class="actions">
    <%= f.submit "Sign up" %>
  </div>
<% end %>

<%= render "devise/shared/links" %>

application_controller.rb

class ApplicationController < ActionController::Base
  protect_from_forgery with: :exception
  before_action :configure_permitted_parameters, if: :devise_controller?
    def after_sign_in_path_for(resource)
        pages_show_path
    end

    private
        def sign_in_required
            redirect_to new_user_session_url unless user_signed_in?
        end
    protected
      def configure_permitted_parameters
        devise_parameter_sanitizer.permit(:sign_up, keys: [:username])
        devise_parameter_sanitizer.permit(:account_update, keys: [:username])
      end
end

table

table|schema_migrations|schema_migrations|2|CREATE TABLE "schema_migrations" ("version" varchar NOT NULL PRIMARY KEY)
index|sqlite_autoindex_schema_migrations_1|schema_migrations|3|
table|ar_internal_metadata|ar_internal_metadata|4|CREATE TABLE "ar_internal_metadata" ("key" varchar NOT NULL PRIMARY KEY, "value" varchar, "created_at" datetime NOT NULL, "updated_at" datetime NOT NULL)
index|sqlite_autoindex_ar_internal_metadata_1|ar_internal_metadata|5|
table|users|users|6|CREATE TABLE "users" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "email" varchar DEFAULT '' NOT NULL, "encrypted_password" varchar DEFAULT '' NOT NULL, "reset_password_token" varchar, "reset_password_sent_at" datetime, "remember_created_at" datetime, "created_at" datetime NOT NULL, "updated_at" datetime NOT NULL, "username" varchar)
table|sqlite_sequence|sqlite_sequence|7|CREATE TABLE sqlite_sequence(name,seq)
index|index_users_on_email|users|8|CREATE UNIQUE INDEX "index_users_on_email" ON "users" ("email")
index|index_users_on_reset_password_token|users|10|CREATE UNIQUE INDEX "index_users_on_reset_password_token" ON "users" ("reset_password_token")

よろしくお願いします。

環境
rails 5.1.7
sqlite3