class Doorkeeper::OAuth::InvalidTokenResponse

def self.from_access_token(access_token, attributes = {})
  reason = case
           when access_token.try(:revoked?)
             :revoked
           when access_token.try(:expired?)
             :expired
           else
             :unknown
           end
  new(attributes.merge(reason: reason))
end

def description
  scope = { scope: [:doorkeeper, :errors, :messages, :invalid_token] }
  @description ||= I18n.translate @reason, scope
end

def initialize(attributes = {})
  super(attributes.merge(name: :invalid_token, state: :unauthorized))
  @reason = attributes[:reason] || :unknown
end