marketing cloud how to send sms

0.setup--->InstalledPackages--->new

1. api request code

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       String clientId = 'clientId';
       String clientSecret = 'clientSecret';
       String tokenUrl = 'https://[get this from step 0].auth.marketingcloudapis.com/v2/token';
       
       HttpRequest req = new HttpRequest();
       req.setEndpoint(tokenUrl);
       req.setMethod('POST');
       req.setHeader('Content-Type', 'application/json');
       
       String body = '{"grant_type":"client_credentials","client_id":"' + clientId + '","client_secret":"' + clientSecret + '"}';
       req.setBody(body);
       
       Http http = new Http();
       HttpResponse res = http.send(req);
       

           Map<String, Object> responseMap = (Map<String, Object>) JSON.deserializeUntyped(res.getBody());



Object accessToken =responseMap.get('access_token');
system.debug(accessToken);
// リクエストJSON
       String smsReqJson = '{"ContactKey": "[step 3]",'
                         + '"EventDefinitionKey":"get it from journey builder",'
                         + '"Data": {'
                         + '         "contactkey":"required",'
                         + '         "sentdate":"' + String.ValueofGmt(Datetime.now()) + '",'
                         + '         "country":"JP",'
                         + '         "phone":"yourphone",'
                         + '         "name":"yourname"'
                         + '}}';  

       // エンドポイント
       String endpoint2 = 'https://[get this from step 0].rest.marketingcloudapis.com/interaction/v1/events';
       // HTTPリクエスト
       HttpRequest req2 = new HttpRequest();
       req2.setEndpoint(endpoint2);
       req2.setMethod('POST');
       req2.setHeader('Content-Type', 'application/json');
       req2.setHeader('Authorization', 'Bearer ' + String.valueof(accessToken));
       req2.setBody(smsReqJson);


Http http2 = new Http();
       HttpResponse res2 = http2.send(req2);
       
       System.debug(res.getBody());

2.journey builder
api event---> SMS

3.mobile connect
add contacts--->manually or input file

ensure your phone number is correct and your contact key is equal to your api request code