Send bool from html to unity

I'm trying to send a bolean value from html to unity.
I tried this , but doesn't work:

cs:
`webViewObject.Init(
cb: (msg) =>
{
Debug.Log(string.Format("CallFromJS[{0}]", msg));

			if (msg == "SetLoginOn")
			{
				Debug.Log("Login On!");
			} else if (msg == "SetLoginOff") {
				Debug.Log("Login Off!");
			}`

html:

<a href="javascript:void(0)" onclick="Unity.call('SetLoginOn');">[Login!]</a></p>

Nothing logs to the console. Also, i tried to call a method on unity, without sucess.

Start by tracing the webViewObject.Init callback and the HTML Unity.call('SetLoginOn') entry point shown in the report. Compare the bridge's expected message format with this call and verify that the callback logs the received message; the issue is done when the login message reaches Unity and the corresponding console output appears.