ERROR user canceled input

I've just been trying to set up the keybase client on my server (I ssh into when I;m out and about if I need a linux environment), but I got this error:

```
sbrl@starbeamrainbowlabs:$ keybase login sbrl
How would you like to sign this install of Keybase?

(1) Use an existing device
(2) Use a paper key
(3) Use my Keybase passphrase
▶ ERROR user canceled input
```

Can anyone help me please?

Start by reproducing the `keybase login sbrl` command in the SSH-based Linux environment described in the report. Investigate why the interactive signing prompt reports canceled input, and consider the issue resolved when the cause is identified and a verified login path or clear user-facing explanation is documented.

Written by the indexing model from the issue text.