Twilio SMS Parsing using objective C - objective-c

Question

I need to integrate SMS Verification using Twilio url.
I have ACCOUNT_SID,AUTH_TOKEN and url but not able to parse using Objective C.
CODE:
NSURLSessionConfiguration *config = [NSURLSessionConfiguration defaultSessionConfiguration];
NSURLSession *session = [NSURLSession sessionWithConfiguration:config delegate:self delegateQueue:[NSOperationQueue mainQueue]];
NSString *post = [NSString stringWithFormat:#"From='number'To=%#&Body=message %d to verify your mobile number.",txt_otp.text,[[self sms_verification_code]intValue]];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:#"https://api.twilio.com/2010-04-01/Accounts/(SID)/SMS/Messages"]cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];
NSString *authStr = [NSString stringWithFormat:#"SID:TOKEN"];
NSData *authData = [authStr dataUsingEncoding:NSUTF8StringEncoding];
[request setHTTPMethod:#"POST"];
[request setHTTPBody:[post dataUsingEncoding:NSUTF8StringEncoding]];
NSString *authValue = [NSString stringWithFormat:#"Basic %#", [authData base64EncodedStringWithOptions:0]];
[request setValue:authValue forHTTPHeaderField:#"Authorization"];
[[session dataTaskWithRequest:request
completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
if (!error) {
NSDictionary *responseDictionary = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
NSLog(#"SMS verification%#",responseDictionary);
}
}] resume];

Answer 1

I have succeeded parsing using AFNetworking SDK.
NSString *kTwilioSID = #"sid";
NSString *kTwilioSecret = #"token";
NSString *kFromNumber = #"";
NSString *kToNumber =#"";
NSString *kMessage = [NSString stringWithFormat:#"message %d",[[self sms_verification_code] intValue]];
NSString *urlString = [NSString
stringWithFormat:#"https://%#:%##api.twilio.com/2010-04-01/Accounts/%#/SMS/Messages/",
kTwilioSID, kTwilioSecret,kTwilioSID];
NSDictionary*
dic=#{#"From":kFromNumber,#"To":kToNumber,#"Body":kMessage};
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
manager.responseSerializer=[AFHTTPResponseSerializer serializer];
manager.responseSerializer.acceptableContentTypes=[NSSet setWithObject:#"application/xml"];
[manager POST:urlString parameters:dic progress:nil success:^(NSURLSessionTask *task, id responseObject) {
NSLog(#"success %#",[[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding]);
completion:nil];
} failure:^(NSURLSessionTask *operation, NSError *error) {
NSLog(#"Error: %#", error);
}];