モデルを作成
ps > dotnet ef dbcontext scaffold "Server=localhost;Database=testdb;Integrated Security=True; User ID=user_xxx;Password=pass_xxx;" Microsoft.EntityFrameworkCore.SqlServer -f -o Models
ps > dotnet ef dbcontext scaffold "Server=localhost;Database=testdb;Integrated Security=True; User ID=user_xxx;Password=pass_xxx;" Microsoft.EntityFrameworkCore.SqlServer -f -o Models