!!! Overview [1]
[{$pagename}] is done by the [Relying Party] ([OAuth Client]) which sends the [request] to the [Userinfo_endpoint] to obtain [Claims] about the [Resource Owner](End-User) using the [Access Token] obtained through [OpenID Connect] [Authentication]. [OAuth Clients] [MUST] present a valid [access_token] (of type bearer) to retrieve the [UserInfo Response] [claims]. Only those [claims] that are [scoped|OAuth Scopes] by the token will be made available to the [OAuth Client].

[{$pagename}] can use [OpenID Connect Standard Claims] and possibly other [Claims]

All [Communication] with the [Userinfo_endpoint] [MUST] utilize [TLS].

[{$pagename}] [SHOULD] use the [HTTP GET] method and the [Access Token] [SHOULD] be sent using the [HTTP Request Header] [Authorization Header].

!! More Information 
There might be more information for this subject on one of the following: 
[{ReferringPagesPlugin before='*' after='\n' }] 
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* [#1] - [OpenID Connect Basic Client Implementer's Guide 1.0|https://openid.net/specs/openid-connect-basic-1_0.html#UserInfoRequest|target='_blank'] - based on data observed:2016-05-18