OAuth2TokenExchangeContext
When the OAuth2TokenExchangeFilter succesfully issues a token, it injects the issued token and its scopes into this context.
Properties
The context name is OAuth2TokenExchangeContext, and is accessible at
${contexts.oauth2TokenExchange}.
The context has the following properties:
"issuedToken": string- 
The token issued by the authorization server.
 "issuedTokenType": string- 
The token type URN.
 "scopes": set of strings- 
One or more scopes associated with the issued token, for example,
"scope1", "scope2", "scope3". "rawInfo": raw JSON as a JsonValue- 
The raw token info as issued by the authorization server.