Creating a Custom OAuth App for Google Accounts

Create a Custom OAuth App: Web Apps

Follow the steps below to obtain the OAuthClientId and OAuthClientSecret.

1. Log into the Google API Console.
2. Click Create Project or select an existing project.
3. In the API Manager, click Credentials -> Create Credentials -> OAuth Client Id.
4. Select the web application type. In the Authorized Redirect URIs box, enter the URL you want to be used as a trusted redirect URL, where the user will return with the token that verifies that they have granted your app access.
5. Click Create. The OAuthClientId and OAuthClientSecret are displayed.
6. Click Library -> Gmail API -> Enable API.

Create a Custom OAuth App: Service Account

Follow the steps below to create an OAuth application and create a private key:

1. Log into the Google API Console.
2. Click Create Project or select an existing project.
3. In the API Manager, click Credentials -> Create Credentials -> Service Account Key. In the Service Account menu, select New Service Account or select an existing service account. In the Key Type section, select the P12 key type.
4. Click Create. The key pair is downloaded and the private key's password is displayed.
5. Click Library -> Gmail API -> Enable API.