Objective-C Google Drive: Get Starting pageToken for Listing Future Changes

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Gets the starting pageToken for listing future changes.

Documentation: https://developers.google.com/drive/v3/reference/changes/getStartPageToken

#import <CkoRest.h>
#import <CkoOAuth2.h>
#import <CkoStringBuilder.h>
#import <CkoJsonObject.h>
#import <NSString.h>

CkoRest *rest = [[CkoRest alloc] init];
BOOL success;

//   Provide a previously obtained OAuth2 access token.
CkoOAuth2 *oauth2 = [[CkoOAuth2 alloc] init];
oauth2.AccessToken = @"OAUTH2_ACCESS_TOKEN";
[rest SetAuthOAuth2: oauth2];

success = [rest Connect: @"www.googleapis.com" port: [NSNumber numberWithInt: 443] tls: YES autoReconnect: YES];
if (success != YES) {
    NSLog(@"%@",rest.LastErrorText);
    return;
}

[rest AddQueryParam: @"teamDriveId" value: @"0AEd3EhGff2SaUk9PVA"];
[rest AddQueryParam: @"supportsTeamDrives" value: @"true"];

CkoStringBuilder *sbJson = [[CkoStringBuilder alloc] init];
success = [rest FullRequestNoBodySb: @"GET" uriPath: @"/drive/v3/changes/startPageToken" sb: sbJson];
if (success != YES) {
    NSLog(@"%@",rest.LastErrorText);
    return;
}

if ([rest.ResponseStatusCode intValue] != 200) {
    NSLog(@"%@%d",@"Received error response code: ",[rest.ResponseStatusCode intValue]);
    NSLog(@"%@",@"Response body:");
    NSLog(@"%@",[sbJson GetAsString]);
    return;
}

CkoJsonObject *json = [[CkoJsonObject alloc] init];
[json LoadSb: sbJson];

//  The following code parses the JSON response.
//  A sample JSON response is shown below the sample code.
NSString *kind = 0;
NSString *startPageToken = 0;

kind = [json StringOf: @"kind"];
startPageToken = [json StringOf: @"startPageToken"];

NSLog(@"%@",@"Example Completed.");

Sample JSON Response Body

{
  "kind": "drive#startPageToken",
  "startPageToken": "13"
}