 	var tokenType: String?
 	var createdAt: Date? = Date()
 	var expiresIn: TimeInterval?
+	var refreshToken: String?
 	
 	open var isValid: Bool {
 		if let createdAt = createdAt, let expiresIn = expiresIn {

		accessToken	<- map["access_token"]
		tokenType	<- map["token_type"]
		createdAt	<- (map["created_at"], DateTransform())
		expiresIn	<- (map["expires_in"], TransformOf<TimeInterval, Int>(fromJSON: { TimeInterval($0! / 1000) }, toJSON: { Int($0!) * 1000 }))
	}
}


		}
	}
	
	public init(accessToken: String) {
		self.accessToken = accessToken
	}
	
	// MARK: Mappable protocol
	required public init?(map: Map) {
