# Google Auth Example

> Learn to validate Google auth header in API Maker with sample authGoogle code and config settings.

Source: https://docs.apimaker.dev/v1/examples/req/auth/authGoogle.html

### Google authorization

To get the value of request header `x-google-authorization`, use `g.req.auth.authGoogle`.

```ts
const google_auth = g.req.auth.authGoogle;
```

### Secret file sample object

```json
{
    "authTokenType": "GOOGLE",
    "authTokenGoogle": {
        "clientId": "YOUR_CLIENT_ID",
        "sourceFieldOfUniqueId": "__TOKEN_OBJECT_FIELD_NAME__",
        "groupsDataSource": {
            "instance": "INSTANCE_NAME",
            "database": "DATABASE_NAME",
            "table": "COLLECTION_NAME",
            "targetFieldForUniqueId": "UNIQUE_COLUMN_NAME",
            "groupsColumn": "COMMA_SEPARATED_GROUPS",
            "select": {
                "COLUMN_NAME1": 1,
                "COLUMN_NAME2": 1
            }
        }
    }
}
```

- You will get 'clientId' data are from the Google.
- The 'sourceFieldOfUniqueId' is the field name which you will get after opening Google token, mostly it holds user email address.
- Provide the groups name comma separated in the 'groupsColumn' field and provide the 'instance', 'database', 'table' from which that 'groupsColumn' exist.
- The 'targetFieldForUniqueId' is your database field which contains the exact same value as the 'sourceFieldOfUniqueId' has.
- In 'select' you can define the column name which you want to get in the response.

## Related

- [The global object g](https://docs.apimaker.dev/v1/docs/pre-defined-terms/global-object-g.html) · [Custom APIs](https://docs.apimaker.dev/v1/docs/apis-all/custom-apis/user-created-custom-api.html)