cin90 login

Sign in to coderin90.com from the terminal

Sign in to coderin90.com.

A browser approves the sign-in and the CLI receives a token. You will never be asked for a password here — cin90 does not handle your password at all.

The token is written to ~/.config/cin90/credentials.json, readable only by you. Running this again repairs those permissions if something loosened them.

Instructors: cin90 login --scope mcp signs in to the teaching tools that cin90 teach uses. That token is stored beside your ordinary sign-in and leaves it untouched; if credentials.json cannot be read, it refuses and asks you to run cin90 login first. A plain cin90 login over an unreadable file rewrites it, which drops the teaching tools sign-in; it says so when it does.

Usage

text
cin90 login [flags]

Flags

text
  -h, --help           help for login
      --scope string   what the token is for: cli, or mcp for the teaching tools (default "cli")

See also

Read this page in your terminal: install the cin90 CLI and run cin90 docs. The same page is served as raw markdown.