Passing multiple values in JSON.stringfy in angular6

I tried to pass multiple values to API using JSON.stringfy(). I don't know why my second value is not passing.

This is the code of my attempt:

getUserDetails(email, password){
this.api="http://192.168.1.14/task/public/api/login";
this.http.post(this.api,JSON.stringify(email,password))
.subscribe(data =>
  {
    if(data !=null)
    {
      console.log("LoggedIn Sucess");
    }
    else{
      console.log("Login Failed");
    }
  })
}

The JSON.stringify() method converts a JavaScript object or value to a JSON string, optionally replacing values if a replacer function is specified or optionally including only the specified properties if a replacer array is specified.

JSON.stringify as name suggests convert a JavaScript object into a string representation.

so try this:

getUserDetails(email, password){
this.api="http://192.168.1.14/task/public/api/login";
this.http.post(this.api,JSON.stringify({email: email, password: password}))
    .subscribe(data => {
        if(data != null) {
            console.log("loggedIn success");
        } else {
            console.log("loggedIn failed");
        }
    })
}