login.rb

class Login
  include ActiveModel::Model

  attr_accessor :email, :password, :user
  validates :email, presence: true
  validates :password, presence: true
  validates :user, presence: {message: "email or password is wrong"}

  def initialize(params)
    super(params.require(:user).permit(:email, :password))
    @user = User.find_by(email: email)&.authenticate(password)
  end

  def save
    return if invalid?
    Tokenizer.generate_and_refresh(@user)
  end
end