CLI suggests incorrect/deprecated command when there is an error validating an identity

[cloutiertyler]

https://discordapp.com/channels/1037340874172014652/1138987509834059867/1314749435061731432

Generate a new identity with:
        spacetime identity new --no-email --server sp --default

Caused by:
    Other(Error fetching public key for issuer https://auth.spacetimedb.com

[bfops]

We no longer have this helptext. Fixed by #1954 .