keeping user logged in after registeration code example

Example 1: how to set state for logged in users

var mongoose = require('mongoose'),
    Schema = mongoose.Schema,
    bcrypt = require('bcrypt'),
    SALT_WORK_FACTOR = 10;

var UserSchema = new Schema({
    username: { type: String, required: true, index: { unique: true } },
    password: { type: String, required: true }
});

module.exports = mongoose.model('User', UserSchema);

Example 2: abp session logged in user

[DependsOn(
    typeof(MyAppApplicationModule),
    typeof(MyAppDataModule))]
public class MyConsoleAppModule : AbpModule {

    public override void PreInitialize() {
        // set my IAbpSession implementation
        Configuration.IocManager.RegisterIfNot(DependencyLifeStyle.Singleton);
    }

    public override void Initialize() {
        IocManager.RegisterAssemblyByConvention(Assembly.GetExecutingAssembly());
    }
}