What is the method for utilizing the existing Firebase "alias" title in an NPM script?

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To utilize the existing Firebase "alias" title in an NPM script, you can use the following command:

firebase use <alias> --add

This command will add the alias to the Firebase configuration and set it as the active project. Once the alias is added, you can reference it in your NPM script using the $FIREBASE_PROJECT_ID environment variable.

For example, if your alias is called "production", you can use the following command in your NPM script:

"deploy": "firebase deploy --project $FIREBASE_PROJECT_ID"

This will deploy your Firebase project using the "production" alias as the active project.