fix: resolve bearer issues

Author: erikbdev

Sources/XKit/DeveloperServices/OpenAPI/ASCKey.swift

@@ -16,7 +16,10 @@ public struct ASCKey: Sendable {
 actor ASCJWTGenerator {
     // the duration for which we generate JWTs.
     // ASC allows a maximum of 20 minutes.
-    private static let ttl: TimeInterval = 60 * 20
+    //
+    // Apple sometimes rounds up, causing the expiry to go over 20 seconds.
+    // This leads to an invalid token.
+    private static let ttl: TimeInterval = 60 * 19
 
     // the minimum remaining ttl for us to consider reusing a previous key.
     // that is, we reuse the last JWT if it has at least [threshold] seconds