How to make customer login using API endpoint?

I want to make the customer log in using the API endpoint.
The login API just returns "ContextToken’ like this.
API ENDPOINT : http://local.shopware/store-api/account/login
Data :
{
„username“: „tejas.parmar@rootinfosoll.com“,
„password“: „12345678“
}

Response:
{
„apiAlias“: „array_struct“,
„contextToken“: „Hw4Cg0xqvtt2Z3xYD44yw3KyWMfXGIrz“,
„redirectUrl“: null
}

That is all. If you get a contextToken then the customer is logged in.

Thanks for Reply.
Yes, that I understood, the customer is logged in.
But this time I have login using the site’s login page.
I want to make the customer login programmatically or through API.

It is the same. You use the email and password from the form and send it via api to the backend. Then you reload the page and the customer is logged in.

Ok. Thanks for your reply.
I will try that thing.
Is there any way by which we can programmatically make customers log in?