slarny4/Demo1/Data/RemoteData/RemoteDataBase/DesignTimeDbContextFactoryBase.cs

using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Design;

namespace Demo.Data.RemoteData.RemoteDataBase
{
    public abstract class DesignTimeDbContextFactoryBase<TContext> : IDesignTimeDbContextFactory<TContext> where TContext : DbContext
    {
        public TContext CreateDbContext(string[] args)
        {
            var builder = new DbContextOptionsBuilder<TContext>();
            builder.UseNpgsql("Host=45.67.56.214;Port=5421;Database=user5;Username=user5;Password=EtEJqhsf");

            return CreateNewInstance(builder.Options);
        }

        protected abstract TContext CreateNewInstance(DbContextOptions<TContext> options);
    }
}