Checks an authorization request's grant management parameters before anyone
signs in: their own rules, a confidential client, and a response type that
ends at the token endpoint.
Parameters
params: any
the authorization request's parameters
opts: any
responseTypes, the request's response types
Returns Refusal
null, or a refusal in the authorization endpoint's vocabulary
Checks an authorization request's grant management parameters before anyone signs in: their own rules, a confidential client, and a response type that ends at the token endpoint.