[Openid-specs-ab] [openid/connect] Messages - Username claim (issue #584)
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Wed May 16 17:08:39 UTC 2012
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New issue 584: Messages - Username claim
There's no claim in the userinfo endpoint for a user's preferred username on a service. This is semantically distinct from "name", which is meant to be the full display name of the user, "nickname", which is meant to be a shortened form of the first name for display purposes, or "user_id", which is meant to be a server-issued unique identifier. This is intended to be a traditional "username", something user-displayable with no spaces that is generally chosen by the user. While they are often unique within a given IdP's domain, their uniqueness MUST NOT be relied upon, and an RP that supports usernames can make no guarantees for a user to be granted their preferred username locally.
Facebook defines the "username" claim on their graph API's user endpoint:
Portable Contacts defines a "preferredUsername" claim in their schema:
I suggest that we use the Facebook form to keep it in line with the rest of the UserInfo schema.
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