public async Task <ActionResult <PostImageCommandResponse> > Post([FromBody] PostImageCommand request)
 {
     return(await Send(request));
 }
 public async Task <ActionResult <PostImageCommandResponse> > Post(PostImageCommand request, CancellationToken cancellationToken = default(CancellationToken))
 {
     return(await Mediator.Send(request, cancellationToken));
 }