!!! Overview 
[{$pagename}] ([issuer]) is an [Abbreviation] or [Parameter]

!! [OAuth 2.0] 
[{$pagename}] ([issuer]) in the [Access Token] identifies the [Digital Identity] that issued the [Access Token].

[RFC 9207] further defines [{$pagename}] and that in the [Authorization Response] to the [client|OAuth Client], including [error responses|OAuth Error], an [Authorization Server] supporting this specification [MUST] indicate its identity by including the [iss] parameter in the [Authorization Response]

!! [OpenID Connect]
[{$pagename}] (issuer)  __OPTIONAL__ [Reserved Claim Name] for [JSON Web Token Claims] identifies the principal that issued the [JSON Web Token].  

The processing of this claim is generally application specific. 

The "[{$pagename}]" value is a [case-sensitive] string containing a [StringOrURI] value.

!! More Information
There might be more information for this subject on one of the following:
[{ReferringPagesPlugin before='*' after='\n' }]