public async void AdminCreatesRole(string role)
        {
            var statement = new CreateRoleStatement(role);
            var result    = await statement.ExecuteAsync(adminContext);

            Assert.NotNull(result);
            Assert.True(result.IsEmpty());
            Assert.Equal(role, createdRole);
        }
        public async void UserCreatesRole(string role)
        {
            var statement = new CreateRoleStatement(role);

            await Assert.ThrowsAsync <UnauthorizedAccessException>(() => statement.ExecuteAsync(userContext));
        }