Social Login Always Create New Users

[rhidajat]

I have existing users in my user pool and now I want to allow them to sign in using social Login, in this case Google. My problem is that whenever users signs in with their Google account, cognito does not map the google email address to existing user with that email address, thus it will create a different user altogether.

Can anyone confirm that Cognito does not support mapping to existing users? Or am I missing something here?

I have set the Attribute Mapping to map Google's email to Cognito's email field.

[mymattcarroll]

You can use CognitoIdentityServiceProvider.adminLinkProviderForUser: https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/CognitoIdentityServiceProvider.html#adminLinkProviderForUser-property

[rhidajat]

@mymattcarroll, thanks for the pointer! I am gonna give it a try!