rails: devise add username

rails_devise_add_username.rb

# ApplicationController
before_action :configure_permitted_parameters, if: :devise_controller?

protected
def configure_permitted_parameters
  devise_parameter_sanitizer.for(:sign_up) { |u| u.permit(:username, :email, :password, :password_confirmation, :remember_me) }
  devise_parameter_sanitizer.for(:sign_in) { |u| u.permit(:login, :username, :email, :password, :remember_me) }
  devise_parameter_sanitizer.for(:account_update) { |u| u.permit(:username, :email, :password, :password_confirmation, :current_password) }
end

# Or

before_action :configure_permitted_parameters, if:  :devise_controller?

protected

def configure_permitted_parameters
  devise_parameter_sanitizer.for(:sign_up) << :name  
end