Fix hack incompatibility with cryptfile keyring

I'm not exactly sure what this hack was ever supposed to accomplish, but it's clearly unnecessary for dummy keyrings like keyrings.alt or keyrings.cryptfile. When I try to login, the CLI just crashes with an AttributeError on keyring.backend.get_all_keyring.__wrapped__.always_returns, which is what the hack is trying to remove anyway.

So this patch just skips trying to del the attribute if it already doesn't exist.

funkwhale_cli/cli/auth.py

@@ -57,7 +57,10 @@ class lazy_credential:
 def init_keyring():
     # small hack to fix some weird issues with pyinstaller and keyring
     # there seems to be a cache issue somewhere
-    del keyring.backend.get_all_keyring.__wrapped__.always_returns
+    try:
+        del keyring.backend.get_all_keyring.__wrapped__.always_returns
+    except AttributeError:
+        pass
     keyring.core.init_backend()
     # /end of hack