public async Task RegisterAsync_WhenCreatedSuccessfully_ShouldReturnSuccessResponse()
{
var request = new RegistrationRequest()
{
Email = "email",
FirstName = "first name",
LastName = "last name",
Password = "******",
Username = "******"
};
_mockUserManger.Setup(e => e.CreateAsync(It.IsAny <User>(), request.Password))
.ReturnsAsync(IdentityResult.Success);
mockEmailHelperService.Setup(e => e.SendEmailConfirmationEmail(It.IsAny <EmailSendRequest>()))
.ReturnsAsync(ApiResponse.Success());
var response = await sut.RegisterAsync(request);
response.IsSuccess.Should().BeTrue();
response.StatusCode.Should().Be(200);
}