flywire_set_token uses old token filename

[jefferis]

reported by

FlyWire
----
• FlyWire token exists but is not authorised. Set a new token with:
  `flywire_set_token()`
Error in py_call_impl(x, dots$args, dots$keywords) : 
  HTTPError: 401 Client Error: UNAUTHORIZED for url: https://prodv1.flywire-daf.com/segmentation/api/v1/table/fly_v31/roots_binary
You have a valid token but python+cloudvolume access to FlyWire API is still failing!
Please ask for help at https://groups.google.com/g/nat-user using the full output of dr_fafbseg.

1 FlyWire/CloudVolume credential files available at
/Users/Myers/.cloudvolume/secrets
[1] "cave-secret.json"