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now:tldr:01f9a
The command "now login" is used to log in to the Now CLI (Command Line Interface) provided by Vercel, a cloud platform for serverless deployment and hosting.
When you use the "now login" command, it prompts you to open a web page in your default browser where you can authenticate yourself using your Vercel account or by using a third-party service like GitHub, GitLab, or Bitbucket. This authentication process generates a token that allows the CLI to identify you and grant you access to your Vercel account.
Once you successfully log in, the CLI will store the authentication token and you will be able to use other Vercel commands that require authentication, such as deploying projects or managing deployments, without having to manually log in again.