Before you can use the Cloud Vision API, you must enable it for your project:
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Sign in to your Google Account.
If you don't already have one, sign up for a new account.
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In the Google Cloud Console, on the project selector page, select or create a Google Cloud project.
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Make sure that billing is enabled for your Cloud project. Learn how to confirm that billing is enabled for your project.
- Enable the Cloud Vision API.
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Set up authentication:
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In the Cloud Console, go to the Create service account key page.
Go to the Create Service Account Key page - From the Service account list, select New service account.
- In the Service account name field, enter a name.
From the Role list, select Project > Owner.
- Click Create. A JSON file that contains your key downloads to your computer.
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Set the environment variable
GOOGLE_APPLICATION_CREDENTIALS
to the path of the JSON file that contains your service account key. This variable only applies to your current shell session, so if you open a new session, set the variable again.