cargo login - The Cargo Book

# cargo login

## NAME

cargo-login - Save an API token from the registry locally

## SYNOPSIS

`cargo login [OPTIONS] [TOKEN]`

## DESCRIPTION

This command will save the API token to disk so that commands that require authentication, such as cargo-publish(1), will be automatically authenticated. The token is saved in `$CARGO_HOME/credentials.toml`. `CARGO_HOME` defaults to `.cargo` in your home directory.

If the TOKEN argument is not specified, it will be read from stdin.

The API token for crates.io may be retrieved from https://crates.io/me.

Take care to keep the token secret, it should not be shared with anyone else.

## OPTIONS

### Login Options

--registry REGISTRY

  Name of the registry to use. Registry names are defined in Cargo config files. If not specified, the default registry is used, which is defined by the `registry.default` config key which defaults to `crates-io`.

### Display Options

-v
--verbose

  Use verbose output. May be specified twice for "very verbose" output which includes extra output such as dependency warnings and build script output. May also be specified with the `term.verbose` config value.

-q
--quiet

  No output printed to stdout.

--color WHEN

  Control when colored output is used. Valid values:

  - `auto` (default): Automatically detect if color support is available on the terminal.

  - `always`: Always display colors.

  - `never`: Never display colors.

  May also be specified with the `term.color` config value.

### Common Options

+TOOLCHAIN

  If Cargo has been installed with rustup, and the first argument to `cargo` begins with `+`, it will be interpreted as a rustup toolchain name (such as `+stable` or `+nightly`). See the rustup documentation for more information about how toolchain overrides work.

-h
--help

  Prints help information.

-Z FLAG…​

  Unstable (nightly-only) flags to Cargo. Run `cargo -Z help` for details.

## ENVIRONMENT

See the reference for details on environment variables that Cargo reads.

## Exit Status

0

  Cargo succeeded.

101

  Cargo failed to complete.

## EXAMPLES

1. Save the API token to disk:

       cargo login

## SEE ALSO

cargo(1), cargo-publish(1)