private Task <Organization> InvokeAddOrganization(string orgName = OrgName, string orgEmail = OrgEmail, User admin = null) { // Arrange admin = admin ?? new User(AdminName) { Credentials = new Credential[] { new CredentialBuilder().CreateExternalCredential( issuer: "AzureActiveDirectory", value: "abc123", identity: "Admin", tenantId: "zyx987") } }; _service.MockDateTimeProvider .Setup(x => x.UtcNow) .Returns(OrgCreatedUtc); // Act return(_service.AddOrganizationAsync(orgName, orgEmail, admin)); }