Simple Objective-C API Call

fetchData.m

- (NSString *)fetchData {
    
    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
    [request setHTTPMethod:@"GET"];
    [request setURL:[NSURL URLWithString:stringURL]];
    
    [[[NSURLSession sharedSession] dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data,
                                                                                  NSURLResponse * _Nullable response,
                                                                                  NSError * _Nullable error) {
        NSString *myString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
        NSLog(@"Data received: %@", myString);
    }] resume];