public async Task When_Calling_update_mediator_invokes_handler()
{
_mediator.Setup(x => x.Send(It.IsAny <UpdateOrganisationRequest>(), It.IsAny <CancellationToken>())).ReturnsAsync(true);
await _controller.Update(new UpdateOrganisationRequest());
_mediator.Verify(x => x.Send(It.IsAny <UpdateOrganisationRequest>(), It.IsAny <CancellationToken>()), Times.Once);
}