# Authenticate using user attributes

**URL:** <https://forum.keycloak.org/t/authenticate-using-user-attributes/12949>\
**Category:** Getting advice\
**Tags:** authentication\
**Created:** [January 10, 2022, 10:41am UTC](https://forum.keycloak.org/t/authenticate-using-user-attributes/12949 "2022-01-10T10:41:25Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![briche](https://yyz2.discourse-cdn.com/free1/user_avatar/forum.keycloak.org/briche/32/4758_2.png) [@briche](https://forum.keycloak.org/u/briche)\
**Post date:** [January 10, 2022, 10:41am UTC](https://forum.keycloak.org/t/authenticate-using-user-attributes/12949/1 "2022-01-10T10:41:25Z")

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Hi. I would like to know if it is possible to authenticate a user with either his/her mobile number which is already added in user attributes. I understand that user identification can be done by username or email address by default.  
Thanks to advise.