Oidc.Scopes
https://openid.net/specs/openid-connect-basic-1_0.html#Scopes
type t = [
]
REQUIRED and optional are just for OpenID connect, OAuth2 doesn't have any defiend scopes
val of_string : string -> t
val to_string : t -> string
val of_scope_parameter : string -> t list
val to_scope_parameter : t list -> string