Add Pushed Authorization Request response type

crates/oauth2-types/src/requests.rs

@@ -529,6 +529,24 @@ pub struct IntrospectionResponse {
     pub jti: Option<String>,
 }
 
+/// A successful response from the [Pushed Authorization Request Endpoint].
+///
+/// Note that there is no request type because it is by definition the same as
+/// [`AuthorizationRequest`].
+///
+/// [Pushed Authorization Request Endpoint]: https://datatracker.ietf.org/doc/html/rfc9126
+#[serde_as]
+#[skip_serializing_none]
+#[derive(Serialize, Deserialize, Debug, PartialEq, Eq)]
+pub struct PushedAuthorizationResponse {
+    /// The `request_uri` to use for the request to the authorization endpoint.
+    pub request_uri: String,
+
+    /// The duration for which the request URI is valid.
+    #[serde_as(as = "DurationSeconds<i64>")]
+    pub expires_in: Duration,
+}
+
 #[cfg(test)]
 mod tests {
     use serde_json::json;