app/controllers/application_controller.rb
class ApplicationController < ActionController::Base
# Prevent CSRF attacks by raising an exception.
# For APIs, you may want to use :null_session instead.
protect_from_forgery with: :exception
before_action :configure_permitted_parameters, if: :devise_controller?
protected
def configure_permitted_parameters
devise_parameter_sanitizer.permit(:sign_up, keys: [:username])
devise_parameter_sanitizer.permit(:account_update, keys: [:username])
devise_parameter_sanitizer.permit(:sign_in, keys: [:username, :email])
end
end