Chat Signing is Forced for Commands

[WhoTho]

When sending commands through client.chat, chat signing of command arguments is forced despite the client not having profile keys. This causes the "Can't sign message without profile keys, please set valid auth mode" error.

I don't know how chat signing works, but I assume it'll be as easy to fix as changing the signing line in signaturesForCommand to something like:

signatures.push({
  argumentName: fieldName,
  signature:
    client.profileKeys ?
    client.signMessage(signable, ts, salt, preview, acknowledgements) :
    Buffer.alloc(0)
})

[frej4189]

Can be fixed by mirroring the normal chat message signing behaviour (e.g. providing no signature when profile keys are not set)

node-minecraft-protocol/src/client/chat.js

Line 403 in 827b6cd

signature: (client.profileKeys && client._session) ? client.signMessage(message, options.timestamp, options.salt, undefined, acknowledgements) : undefined,

[extremeheat]

@frej4189 Can you open a PR to fix or show suggested patch?

[extremeheat]

Should be fixed with #1277