If dotnet ef has not been installed, install it as a global tool:

.NET CLICopy

dotnet tool install --global dotnet-ef

For more information on the CLI for EF Core, see EF Core tools reference for .Net CLI.

Run the following .NET CLI commands:

.NET CLICopy

dotnet ef migrations add InitialCreate
dotnet ef database update

• ef migrations add InitialCreate: Generates an _Migrations/{timestamp}InitialCreate.cs migration file. The InitialCreate argument is the migration name. Any name can be used, but by convention, a name is selected that describes the migration. This is the first migration, so the generated class contains code to create the database schema. The database schema is based on the model specified in the MvcMovieContext class, in the Data/MvcMovieContext.cs file.
• ef database update: Updates the database to the latest migration, which the previous command created. This command runs the Up method in the _Migrations/{time-stamp}InitialCreate.cs file, which creates the database.

EF CLI

dotnet add package Microsoft.EntityFrameworkCore.Design

dotnet ef migrations add InitialCreate
dotnet ef database update

Your startup project 'AuthorizeServer' doesn't reference Microsoft.EntityFrameworkCore.Design. This package is required for the Entity Framework Core Tools to work. Ensure your startup project is correct, install the package, and try again.

SQLite

dotnet add package Microsoft.EntityFrameworkCore
dotnet add package Microsoft.EntityFrameworkCore.Sqlite

using Microsoft.EntityFrameworkCore;

public void ConfigureServices(IServiceCollection services)
{
services.AddDbContext<ApplicationDbContext>(options =>
	options.UseSqlite(Configuration.GetConnectionString("DefaultConnection")));
}

Related Ref:

Get started with ASP.NET Core MVC

Tutorial: Create a web API with ASP.NET Core

Tutorial: Create a Razor Pages web app with ASP.NET Core