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[@salesforce/b2c-tooling-sdk](../../modules.md) / [scapi](../index.md) / selectScapiAuth

# Function: selectScapiAuth()

> **selectScapiAuth**(`document`, `operation`): [`ScapiRequestAuth`](../type-aliases/ScapiRequestAuth.md) \| `undefined`

Defined in: [packages/b2c-tooling-sdk/src/scapi/authentication.ts:44](https://github.com/SalesforceCommerceCloud/b2c-developer-tooling/blob/bceb8da43dd8bc63d57932bbd905d36a1b40c949/packages/b2c-tooling-sdk/src/scapi/authentication.ts#L44)

Choose the executor's authentication from the operation's declared security,
in declaration order: Account Manager (AmOAuth2) or a guest shopper token.
Undefined when no declared requirement is supported.

## Parameters

### document

[`ScapiSchemaDocument`](../interfaces/ScapiSchemaDocument.md)

### operation

[`ApiDocument`](../type-aliases/ApiDocument.md)

## Returns

[`ScapiRequestAuth`](../type-aliases/ScapiRequestAuth.md) \| `undefined`