uthorization grant
... send token request
# receive token
#
my %params = ... decode from JSON, URI fragment, etc...
my ($error, @token) = $access_scheme->token_accept(%params)
... complai
ear in a successful token or authorization
endpoint response (i.e., prior to being encoded into a JSON structure
or URI fragment on the authorization server, or, equivalently, after
such decoding on t