public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddDbContext<TodoContext>(opt => opt.UseSqlServer("Server=se00217210\\sqlexpress;Database=WebAPIDB;Trusted_Connection=True;"));
            services.AddMvc();
        }

        public void Configure(IApplicationBuilder app, TodoContext context)
        {
            context.Database.EnsureCreated(); //This should create the database automatically
            app.UseMvc();
        }
    }