Updating the database

It's time to create a new migration and reflect the code changes to the database by taking advantage of the Code-First approach we chose in Chapter 4, Data Model with Entity Framework Core.

Here's a list of what we're going to do in this section:

• Add the identity migration using the dotnet-ef command, just like we did in Chapter 4, Data Model with Entity Framework Core.
• Apply the migration to the database, updating it without altering the existing data or performing a drop and recreate.
• Seed the data using the CreateDefaultUsers() method of SeedController that we implemented earlier on.

Let's get to work.

Adding identity migration

The first thing we need to do is to add a new migration to our data model to reflect the changes that we have implemented by extending the ApplicationDbContext class.

To do that, open a command line or PowerShell prompt and go to our WorldCities project's root...