Sending Unique ID to Presignup_ExternalProvider triggersource is not showing up in validationData object of event.request

Question

Hi,
My app needs to restrict the user no more than one registration from mobile device. This is true for both custom registration process and via social login (currently using AWSMobileClient.default().showSignIn()).
Below is the code sample which I have coded for swift
 let hostedUIOptions:HostedUIOptions?
        let signInQueryParam = ["data": "hjhjhjhh"]
        switch socialLoginType {
        case .apple:hostedUIOptions = HostedUIOptions(identityProvider: kLoginWith_Apple,signInURIQueryParameters: signInQueryParam)
            break
        ***case .google:hostedUIOptions = HostedUIOptions(identityProvider: kLoginWith_Google,signInURIQueryParameters: ["myCustomData": "customValue"])***
            break
        case .facebook:hostedUIOptions = HostedUIOptions(identityProvider: kLoginWith_Facebook,signInURIQueryParameters: signInQueryParam)
            break
        default:hostedUIOptions = HostedUIOptions(identityProvider: kLoginWith_Google,signInURIQueryParameters: signInQueryParam)
            break
        }
       
        // Present the Hosted UI sign in.
        AWSMobileClient.default().showSignIn(navigationController: vc.navigationController!, hostedUIOptions: hostedUIOptions) { (userState, error) in{}}

I was able to see the parameter in /authorize.

However, I could not see  signInQueryParameters in presignup lambda trigger. is there anyway, I can send custom param from client to presignup trigger in social login signup flow

Sedat SALMAN · Answer

you can send custom parameters from the client to the PreSignUp_ExternalProvider Lambda trigger in a social login signup flow.

In your client code, when calling the showSignIn method, you can add a custom parameter to the signInURIQueryParameters dictionary

```
let signInQueryParam = ["myCustomData": "customValue"]
let hostedUIOptions = HostedUIOptions(identityProvider: kLoginWith_Google, signInURIQueryParameters: signInQueryParam)

AWSMobileClient.default().showSignIn(navigationController: vc.navigationController!, hostedUIOptions: hostedUIOptions) { (userState, error) in
    // Handle the sign in result
}
```

In the PreSignUp_ExternalProvider Lambda function, you can access the custom parameter in the validationData object of the event.request object

```
exports.handler = async (event, context) => {
    // Get the custom parameter from the validationData object
    const customParam = event.request.validationData['myCustomData'];
    
    // Do something with the custom parameter
    
    // Return the event object
    return event;
};
```

Sending Unique ID to Presignup_ExternalProvider triggersource is not showing up in validationData object of event.request

Add your answer

Relevant content