public async Task RemoveFromRoleAsync_ValidMember_HappyPath()
        {
            //arrange
            _repositoryMock.RemoveFromRoleAsync();
            var member = MemberTestUtils.GenerateValidMember();
            var role   = RoleTestUtils.GenerateValidRole();

            //act
            await _facade.RemoveFromRoleAsync(member, role.Name);

            //assert
            _repositoryMock.Verify(x => x.RemoveFromRole(It.IsAny <Member>(), It.IsAny <string>()), Times.Once);
        }