diff --git a/v1/client/client.go b/v1/client/client.go
index b486e66..09ac0e3 100644
--- a/v1/client/client.go
+++ b/v1/client/client.go
@@ -71,7 +71,7 @@ type SafeWebsocketClientBuilder struct {
 	rawQuery       *string
 	useTLS         *bool
 	channelSize    *int64
-	authenticateFn func() error
+	authenticateFn func(*SafeWebsocketClient) error
 }
 
 func NewSafeWebsocketClientBuilder() *SafeWebsocketClientBuilder {
@@ -93,7 +93,7 @@ func (b *SafeWebsocketClientBuilder) UseTLS(useTLS bool) *SafeWebsocketClientBui
 	return b
 }
 
-func (b *SafeWebsocketClientBuilder) AuthenticateFn(authenticateFn func() error) *SafeWebsocketClientBuilder {
+func (b *SafeWebsocketClientBuilder) AuthenticateFn(authenticateFn func(*SafeWebsocketClient) error) *SafeWebsocketClientBuilder {
 	b.authenticateFn = authenticateFn
 	return b
 }
@@ -170,7 +170,7 @@ type SafeWebsocketClient struct {
 	reconnectChans []chan struct{}
 	isConnected    bool
 	doneMap        *SafeMap[string, chan struct{}]
-	authenticateFn func() error
+	authenticateFn func(*SafeWebsocketClient) error
 }
 
 func (wsClient *SafeWebsocketClient) connect() error {
@@ -218,13 +218,12 @@ func (wsClient *SafeWebsocketClient) connect() error {
 	wsClient.isConnected = true
 
 	if wsClient.authenticateFn != nil {
-		if err := wsClient.authenticateFn(); err != nil {
+		if err := wsClient.authenticateFn(wsClient); err != nil {
 			return err
 		}
 	}
 
 	wsClient.mu.WriteHandler(func() error {
-
 		pingCtx, pingCancel := context.WithCancel(context.Background())
 		go wsClient.startPingTicker(pingCtx)
 		wsClient.cancelFuncs = append(wsClient.cancelFuncs, pingCancel)