HTTP Callout from Apex Class

public class simpleHTTPCallOut {
public simpleHTTPCallOut(ApexPages.StandardController controller)

{

}

String ErrorMessage;

public void Login() {

 ErrorMessage='';

 final string baseUrl = 'https://login.salesforce.com/';

 final string username = 'test@test.com';

 final string password = 'test@123';

 Http h = new Http();

 HttpRequest req = new HttpRequest();

 req.setMethod('GET');

 req.setEndpoint(baseUrl + '?loginType=&un='+username+'&pw='+password);

 HttpResponse res = h.send(req);

  

 req.setEndpoint(baseUrl + 'apex/EndPOINTPAGE');

 res = h.send(req);

 if (res.getBody().indexOf('success=true')>-1) {

  system.debug('Success');

 } 

}

}