dotnet ef dbcontext scaffold "Host=my_host;Database=my_db;Username=my_user;Password=my_pw" Npgsql.EntityFrameworkCore.PostgreSQL
If you have other tables in your database, you may use additional parameters – -Schemas and -Tables – to filter the list of schemas and/or tables that are added to the model. For example, you can use the following command:
dotnet ef dbcontext scaffold "host=server;database=test;user id=postgres;" Devart.Data.PostgreSql.Entity.EFCore -Tables dept,emp
References
https://www.npgsql.org/efcore/index.html
https://www.devart.com/dotconnect/postgresql/docs/EFCore-Database-First-NET-Core.html