Register variable in another task

Hi, I hope you are well

Im blocked to register variable to use in other task:

Here is the tree structure:

└── ansible-role
├── add_user.yml
├── collections
│ └── requirements.yml
├── Export-Test.csv
├── roles
├── gargentieri.search
│ └── tasks
│ └── main.yml
├── gargentieri.csv
└── tasks
└── main.yml

I have a CSV file in list with user information for info retrieval and I would like to use it in another role.

Here is the add_user.yml playbook that is running: