Add-Migration in package management console of visual studio not creating database in my local sql server

I am new .net core with angular and also . I am using a video tutorial on using this link. In the module 6, Services and Back-End - chapter 7, Creating the Database with EF Core, a database MoviesAPI is created by configuring in appsettings.json and startup.cs. I followed teacher's steps in the video to create a database MoviesAPI in my local SQL Server Express.

First I tried using the teacher's configuration for DefaultConnection in appsettings.json but after using that my command Add-Migration Initial in my package manager console in Visual Studio didn't create any database MoviesAPI in my sql server.

    "ConnectionStrings": {
    "DefaultConnection": "Data Source=.;Initial Catalog=MoviesAPI;Integrated Security=True;"

  }

Then I tried using this below but it didn't still create a database in my sql server on my computer.

"DefaultConnection": "Data Source=LAPTOP-5QTMTD1A\\SQLEXPRESS;Initial Catalog=MoviesAPI;Integrated;Security=True"

In both cases, I got a build succeeded in my package manager console.

My Startup.cs

            using Microsoft.AspNetCore.Authentication.JwtBearer;
        using Microsoft.AspNetCore.Builder;
        using Microsoft.AspNetCore.Hosting;
        using Microsoft.Extensions.Configuration;
        using Microsoft.Extensions.DependencyInjection;
        using Microsoft.Extensions.Hosting;
        using Microsoft.Extensions.Logging;
        using Microsoft.OpenApi.Models;
        using MoviesApi.Filters;

        using Microsoft.EntityFrameworkCore;

        namespace MoviesApi
        {
            public class Startup
            {
                public Startup(IConfiguration configuration)
                {
                    Configuration = configuration;
                }

                public IConfiguration Configuration { get; }

                // This method gets called by the runtime. Use this method to add services to the container.
                public void ConfigureServices(IServiceCollection services)
                {
                    services.AddDbContext(options=> {
                        options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection"));
                    });
                    services.AddCors(options => {
                        options.AddDefaultPolicy(builder => {
                            var frontendURL = Configuration.GetValue("frontend_url");
                            builder.WithOrigins(frontendURL).AllowAnyMethod().AllowAnyHeader();
                        });
                    });
                    services.AddControllers(options=> {
                        options.Filters.Add(typeof(MoviesExceptionFilter));
                    });
                    //E nsures all actions and controllers have simple caching mechanism in the webapi
                    services.AddResponseCaching();
                    services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme).AddJwtBearer();
       
                    services.AddSwaggerGen(c =>
                    {
                        c.SwaggerDoc("v1", new OpenApiInfo { Title = "MoviesApi", Version = "v1" });
                    });
                }

                // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
                public void Configure(IApplicationBuilder app, IWebHostEnvironment env,ILogger logger)
                {

      
                    if (env.IsDevelopment())
                    {
                        app.UseDeveloperExceptionPage();
                        app.UseSwagger();
                        app.UseSwaggerUI(c => c.SwaggerEndpoint("/swagger/v1/swagger.json", "MoviesApi v1"));
                    }

                    app.UseHttpsRedirection();

                    app.UseRouting();
                    app.UseCors();
                    //Intercept http request returned from the cache
                    //app.UseResponseCaching();
                    app.UseAuthentication();
                    app.UseAuthorization();

                    app.UseEndpoints(endpoints =>
                    {
                        endpoints.MapControllers();
                    });
                }
            }
        }

After reading some comments on similar post on , I ran the the command in my package manager console and it ended up giving me these warnings but I don't know if these warnings have anything to do with not being able to create a databse through Add-Migration Initial command.

Warnings