!!! Overview
[{$pagename}]  __OPTIONAL__ - an identifier, as described in [Token Type Identifiers] ([OAuth 2.0 Token Exchange] Section 3), for the type of the requested security [token].  For example, a [JWT] can be requested with the identifier "urn:ietf:params:oauth:token-type:jwt". 

If the requested type is unspecified, the issued token type is at the discretion of the [Authorization Server] and may be dictated by knowledge of the requirements of the service or resource indicated by the "resource" or "audience" parameter.!! More Information
There might be more information for this subject on one of the following:
[{ReferringPagesPlugin before='*' after='\n' }]