sourceUser

An external IdP account for a user who doesn't exist yet in the user pool. This user must be a federated user (for example, a SAML or Facebook user), not another native user.

If the SourceUser is using a federated social IdP, such as Facebook, Google, or Login with Amazon, you must set the ProviderAttributeName to Cognito_Subject. For social IdPs, the ProviderName will be Facebook, Google, or LoginWithAmazon, and Amazon Cognito will automatically parse the Facebook, Google, and Login with Amazon tokens for id, sub, and user_id, respectively. The ProviderAttributeValue for the user must be the same value as the id, sub, or user_id value found in the social IdP token.

For OIDC, the ProviderAttributeName can be any mapped value from a claim in the ID token, or that your app retrieves from the userInfo endpoint. For SAML, the ProviderAttributeName can be any mapped value from a claim in the SAML assertion.

The following additional considerations apply to SourceUser for OIDC and SAML providers.

• You must map the claim to a user pool attribute in your IdP configuration, and set the user pool attribute name as the value of ProviderAttributeName in your AdminLinkProviderForUser request. For example, email.

• When you set ProviderAttributeName to Cognito_Subject, Amazon Cognito will automatically parse the default unique identifier found in the subject from the IdP token.