Managing Google Pay Authentication Types {#uc-enable-digital-pay-googlepay-manage-authentication}
=================================================================================================

Additional controls are available for Google Pay on `Unified Checkout`. When you enable Google Pay on `Unified Checkout`, you can specify optional parameters that define the types of card authentication you receive from Google Pay. To manage the types of credentials that Google Pay sends, use this expanded payment type object within the allowedPaymentTypes section of the sessions request:

```
"paymentConfigurations": {
    "GOOGLEPAY": {
      "allowedAuthMethods": "<authentication type>"
    }
```

The expanded payment type object has these parameters:

* type: Defines the type of payment option.
* options: Contains specific payment types parameters.  
  For Google Pay, use the new data element allowedAuthMethods within the options section of the payment types object to specify the authentication type you will receive from Google Pay. Possible values:
  * `PAN_ONLY`: Google returns primary account number (PAN) values
  * `CRYPTOGRAM_3DS`: Google returns fully authenticated network token values.
    By default, Google sends both authentication types.

  > IMPORTANT
  > When the complete mandate is used and Google Pay does not authenticate the transaction, then ` Unified Checkout ` completes the authentication request as part of the complete mandate.
  > REST Example: Specify Only PAN Authentication Accepted from Google  
  > This sessions request example specifies that Google Pay is to send only PAN values.

```
"allowedPaymentTypes": [
  "GOOGLEPAY"
],
"paymentConfigurations": {
    "GOOGLEPAY": {
      "allowedAuthMethods": [
        "PAN_ONLY",
        "CRYPTOGRAM_3DS"
      ]
    }
  }
```

REST Example: Simple Google Pay Request  
This sessions request example specifies that Google Pay can send all authentication types. This can be enabled and configured in the `Business Center`. For information about configuring your allowed payment types, see [Configure Payment Options](/docs/vas/en-us/unified-checkout/developer/all/rest/unified-checkout/uc-intro-setup/uc-intro-setup-ebc/uc-intro-payment-options.md "").

```
"allowedPaymentTypes": [
  "PANENTRY",
  "GOOGLEPAY",
  "CLICKTOPAY",
  "PAZE",
  "CHECK"
]
```