How to add another face id to my phone

- How to add another person's face id to my phone
- How do i add another face id to my phone
- How can i add another face id to my phone
- How to add face id to my phone
- How to add someone's face id to my phone
- How do i add another person's face id to my phone
- How to add a second face id to my phone
- How do i add face id to my phone
- How to add face id for apps in iphone