uploadAttachment

open fun uploadAttachment(    @NonNull context: Context,     @NonNull attachmentId: String,     @Nullable operationCallback: STWOperationCallback<MessagingError>)

Call this method to upload an attachment given attachment Id.

Parameters

context

The application context

attachmentId

Attachment Id to be downloaded

operationCallback

This callback will be invoked when the attachments is successfully uploaded or not.