public func loginWithFacebook(accessToken: String, guestUser: BackendlessUser, fieldsMapping: [String: String], responseHandler: ((BackendlessUser) -> Void)!, errorHandler: ((Fault) -> Void)!)
func loginWithTwitter(authToken: String, authTokenSecret: String, guestUser: BackendlessUser, fieldsMapping: [String: String], responseHandler: ((BackendlessUser) -> Void)!, errorHandler: ((Fault) -> Void)!)
func loginWithGoogle(accessToken: String, guestUser: BackendlessUser, fieldsMapping: [String: String], responseHandler: ((BackendlessUser) -> Void)!, errorHandler: ((Fault) -> Void)!)
func addProperties(properties: String...)