public async void UserInAdminRoleDropsOtherUser(string user)
        {
            var statement = new DropUserStatement(user);
            var result    = await statement.ExecuteAsync(userInAdminRoleContext);

            Assert.NotNull(result);
            Assert.True(result.IsEmpty());
            Assert.Equal(user, droppedUser);
        }
        public async void AdminCreatesUserWithPassword(string user)
        {
            var statement = new DropUserStatement(user);
            var result    = await statement.ExecuteAsync(adminContext);

            Assert.NotNull(result);
            Assert.True(result.IsEmpty());
            Assert.Equal(user, droppedUser);
        }
        public async void UserDropsOtherUser(string user)
        {
            var statement = new DropUserStatement(user);

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