public class SendAccountUsingRestApi {
String clientId='3MVG9676d8..z.hDcPLFoiqi2ctTtDy_x5RsHkuU9cjgz2WNbR6qyyrT8Oab.zpRK9whew.gYjriuYbDx41pikpc';
    String clientsecret='608669815107085755889';
    string username='ddddd@trailhead.com';
    String password='TEaST@123';
    String accesstoken_url='https://login.salesforce.com/services/oauth2/token';
    String authurl='https://login.salesforce.com/services/oauth2/authorize';
  public class deserializeResponse{
      public String id;
      public String access_token;   
   }
    public String ReturnAccessToken(SendAccountUsingRestApi Acc){
        String reqbody = 'grant_type=password&client_id='+clientId+'&client_secret='+clientSecret+'&username='+username+'&password='+password; // String reqbody='{"grant_type":"password","client_id":clientId,"client_secret":clientSecret,"username":username,"password":password}';
        Http h= new Http();
        HttpRequest req= new HttpRequest();
        req.setBody(reqbody);
        req.setMethod('POST');
       
        req.setEndpoint('https://ap4.salesforce.com/services/oauth2/token'); //Change "ap4" in url to your Target Org Instance 
        HttpResponse res=h.send(req);
        System.debug(res.getBody()+'###1203res');
        deserializeResponse resp1=(deserializeResponse)JSON.deserialize(res.getBody(),deserializeResponse.class);
        System.debug(resp1+'###1203deserializeresponse');
        return resp1.access_token;
    }

   @future(callout=true)
    public static void createAccount(String Accname){
        SendAccountUsingRestApi acc1= new SendAccountUsingRestApi();
        String accessToken=acc1.ReturnAccessToken(acc1);
        System.debug(accessToken+'###0012');
        if(accessToken!=null){
            String endPoint='https://ap5.salesforce.com/services/data/v32.0/sobjects/Account'; //Change "ap4" in url to your Target Org Instance 
            String jsonstr='{"Name":"'+ Accname +'"}';
            Http h2= new Http();
            HttpRequest req2= new HttpRequest();
            req2.setHeader('Authorization','Bearer ' + accessToken);
            req2.setHeader('Content-Type','application/json');
            req2.setHeader('accept','application/json');
            req2.setBody(jsonstr);
            req2.setMethod('POST');
            req2.setEndpoint(endPoint);
            HttpResponse res2=h2.send(req2);
            System.debug(res2+'###1203createresp');
            deserializeResponse deresp2=(deserializeResponse)System.JSON.deserialize(res2.getBody(),deserializeResponse.class);
            System.debug('###1203createdeser'+deresp2);
        }
    }
    }

trigger SendAccount on Account (after insert) {
    for(Account a:Trigger.new){
        SendAccountUsingRestApi.createAccount(a.name, a.Id);
    }
}

Error	Error: Compile Error: Method does not exist or incorrect signature: void createAccount(String, Id) from the type SendAccountUsingRestApi at line 3 column 33