In Drupal 8, you can add extra fields to the User profile. It is just hidden under Configuration > Account settings > Manage fields. From there, you can add any fields that are available for your Content Types, such as Image, Text, Taxonomy term, etc.
About the author
Xuan Ngo is the founder of OpenWritings.net. He currently lives in Montreal, Canada. He loves to write about programming and open source subjects.