get import nkeys back to the methods

nats/aio/client.py

@@ -33,7 +33,6 @@
 from typing import Any, Awaitable, Callable, Dict, List, Optional, Tuple, Union
 from urllib.parse import ParseResult, urlparse
 
-import nkeys
 try:
     from fast_mail_parser import parse_email
 except ImportError:
@@ -530,6 +529,8 @@ def _setup_nkeys_connect(self) -> None:
     def _setup_nkeys_jwt_connect(self) -> None:
         assert self._user_credentials, "_user_credentials required"
 
+        import nkeys
+
         creds: Credentials = self._user_credentials
 
         if isinstance(creds, tuple):
@@ -633,6 +634,8 @@ def _setup_nkeys_seed_connect(self) -> None:
             self._nkeys_seed or self._nkeys_seed_str
         ), "Client.connect must be called first"
 
+        import nkeys
+
         def _get_nkeys_seed() -> nkeys.KeyPair:
             if self._nkeys_seed_str:
                 seed = bytearray(self._nkeys_seed_str.encode())