To add custom fields you must have the “Custom Fields” addon.
Accessing the custom fields editor
To access the custom fields editor, navigate to Users -> Custom fields into your WordPress dashboard. You will now see a table with the default fields that looks like this:
This is a list of fields group: https://wpusermanager.com/article/40-field-groups. Select a group to display the list of fields within that group, once you’ve selected a group you can add new fields.
Adding new fields
In the newly opened window, click on the “Add custom field” button.
Then type the name of the field and select the type of field you wish to create.
Each section contains the fields types that you can add.
Once the field is created and you’ll be displayed a new modal window, where you can customize name, description, requirements and other settings. Each field has it’s own settings.