public async Task Post_DebitApplicationRequest_Debits_Application()
{
await _controller.DebitApplication(_request);
_mediator.Verify(x =>
x.Send(It.Is <DebitApplicationCommand>(c => c.ApplicationId == _request.ApplicationId && c.Amount == _request.Amount && c.NumberOfApprentices == _request.NumberOfApprentices),
It.IsAny <CancellationToken>()));
}