public async Task <Department> CreateAsync(Department entity)
        {
            var res = await ctx.Departments.AddAsync(entity);

            await ctx.SaveChangesAsync();

            return(res.Entity);
        }
        public async Task <Employee> CreateAsync(Employee entity)
        {
            var res = await ctx.Employees.AddAsync(entity);

            await ctx.SaveChangesAsync();

            return(res.Entity);
        }