I'm making an android app that clicks an image and uploads the image, which has been saved in the phone storage to the cloud using kinvey at backend. But every time i run the code provided on the kinvey website which goes as - 

import com.kinvey.java.core.UploaderProgressListener;
...
java.io.File file = new java.io.File(getFilesDir(), "chicken_fried_waffles.txt");
file.createNewFile();
mKinveyClient.file().upload(file, new UploaderProgressListener() {
    @Override
    public void onSuccess(Void result) {
        Log.i(TAG, "successfully upload file");
    }
    @Override
    public void onFailure(Throwable error) {
        Log.e(TAG, "failed to upload file.", error);
    }
    @Override
    public void progressChanged(MediaHttpUploader uploader) throws IOException {
        Log.i(TAG, "upload progress: " + uploader.getUploadState());
        // all updates to UI widgets need to be done on the UI thread
    }
});

  Then it throws me an exception -

E/Activity file: failed to upload file.

                 com.kinvey.java.KinveyException:

                 REASON: No user is currently logged in.

I don't what I'm doing wrong here. The ping functionality for the same is working fine. Please help