code: def verify_gcp_credentials(ctx):
      # Verify that the user has configured AWS credentials on their computer.
      if not click.confirm(
          "\nMetaflow relies on "
          + yellow("GCP access credentials")
          + " present on your computer to access resources on GCP."
          "\nBefore proceeding further, please confirm that you "
          "have already configured these access credentials on "
          "this computer.",
          default=True,
      ):
          echo(
              "There are many ways to setup your GCP access credentials. You "
              "can get started by getting familiar with the following: ",
              nl=False,
              fg="yellow",
          )
          echo("")
          echo(
              "- https://cloud.google.com/docs/authentication/provide-credentials-adc",
              fg="cyan",
          )
          ctx.abort()
  
imports: import json
  import os
  import sys
  from os.path import expanduser
  from metaflow.util import to_unicode
  from metaflow._vendor import click
  from metaflow.util import to_unicode
  from .util import echo_always, makedirs
label_desc: Use image node_id 30 for calling a global function with example usage: verify_gcp_credentials(ctx) without return types