class Identity < OmniAuth::Identity::Models::ActiveRecord
  auth_key :email
  attr_accessor :old_password

  MAX_LOGIN_ATTEMPTS = 5

  validates :email, uniqueness: true, email: true, presence: true unless :phone_number?
  validates :phone_number, uniqueness: true, numericality: true, presence: true unless :email?
  validates :password, presence: true, length: { minimum: 6, maximum: 64 }
  validates :password_confirmation, presence: true, length: { minimum: 6, maximum: 64 }


  before_validation :sanitize

  def increment_retry_count
    self.retry_count = (retry_count || 0) + 1
  end

  def too_many_failed_login_attempts
    retry_count.present? && retry_count >= MAX_LOGIN_ATTEMPTS
  end

  private

  def sanitize
    self.email.try(:downcase!)
  end

end

我怎么改都是只能手机登陆或者只能邮箱登陆。怎么能实现都可以登录呢。