How to create default value for OneToOne field using symfony

I currently have a user entity that contains multiple values as first_name and last_name for example.

I want to add a OneToOne relation user_informations to my user that will contains a bio field. (Note that I don’t want to add the bio field directly into the user entity )

I have created the entity using the command php bin/console make:entity userInformation

php bin/console make:entity UserInformation

 created: src/Entity/UserInformation.php
 created: src/Repository/UserInformationRepository.php

Then, i have created the OneToOne relation with the User entity

 New property name (press <return> to stop adding fields):
 > user

 Field type (enter ? to see all types) [string]:
 > relation

 What class should this entity be related to?:
 > User

 Relation type? [ManyToOne, OneToMany, ManyToMany, OneToOne]:
 > OneToOne
 Is the UserInformation.user property allowed to be null (nullable)? (yes/no) [yes]:
 > no

And finally, I added the bio field into the user_information

 Add another property? Enter the property name (or press <return> to stop adding fields):
 > bio

 Field type (enter ? to see all types) [string]:

 Field length [255]:

 Can this field be null in the database (nullable) (yes/no) [no]:
 > yes

 updated: src/Entity/UserInformation.php

The problem

the problem is that all my user currently have a null value for the user_information.

I would like to add an empty user_information for all my user but I have no idea about how to do this.

I know I could write some script to create a user_information for each user but there might be something else