Encourage pasting in login tokens, rather than passing on the command-line

[epage]

• I have searched open and closed issues and pull requests for duplicates, using these search terms:
  • login
  • token
  • publish
• I have checked the latest main branch to see if this has already been fixed, in this file:
  • https://github.com/rust-lang/book/blob/main/src/ch14-02-publishing-to-crates-io.md

URL to the section(s) of the book with this problem: https://doc.rust-lang.org/book/ch14-02-publishing-to-crates-io.html#setting-up-a-cratesio-account

Description of the problem: This shows cargo login <token> rather than cargo login with <token> pasted in. This is encouraging users to put their token in their command history (which could also be synced across computers) and is always visible (which is true of pasting, for now, but that can be fixed, see rust-lang/cargo#7813 )

Suggested fix: Copy what the Cargo book does: show the prompt with the token being pasted in.

[chriskrycho]

Ah, we should definitely fix this while working on the 2024 edition revisions. I will see if I can write a PR updating the text (after reading the Cargo book section!) this afternoon. Thanks, @epage!

[chriskrycho]

Aha! @schuelermine caught this last year and opened #3506 to fix it, so we should have it fixed in the online text when that merges after passing CI! 🎉