Get an existing Walley Checkout payment session. May be used to get the Walley html snippet, for example after the Walley Checkout order has been confirmed.
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{- "paymentId": "string",
- "publicToken": "public-SE-20e84dd04dcc3da405696d6f15b5154a9572f64d2394f461",
- "htmlSnippet": "\n <script src=\"https://checkout.uat.walleydev.com/walley-checkout-loader.js\"\n data-token=\"public-SE-20e84dd04dcc3da405696d6f15b5154a9572f64d2394f461\" data-version=\"v2\"></script>\n "
}