Admin Link Provider For User

cognitoidentityprovider_admin_link_provider_for_user

R Documentation

Links an existing user account in a user pool (DestinationUser) to an identity from an external IdP (SourceUser) based on a specified attribute name and value from the external IdP

Description

Links an existing user account in a user pool (DestinationUser) to an identity from an external IdP (SourceUser) based on a specified attribute name and value from the external IdP. This allows you to create a link from the existing user account to an external federated user identity that has not yet been used to sign in. You can then use the federated user identity to sign in as the existing user account.

For example, if there is an existing user with a username and password, this API links that user to a federated user identity. When the user signs in with a federated user identity, they sign in as the existing user account.

The maximum number of federated identities linked to a user is five.

Because this API allows a user with an external federated identity to sign in as an existing user in the user pool, it is critical that it only be used with external IdPs and provider attributes that have been trusted by the application owner.

Amazon Cognito evaluates Identity and Access Management (IAM) policies in requests for this API operation. For this operation, you must use IAM credentials to authorize requests, and you must grant yourself the corresponding IAM permission in a policy.

Learn more

• Signing Amazon Web Services API Requests

• Using the Amazon Cognito user pools API and user pool endpoints

Usage

cognitoidentityprovider_admin_link_provider_for_user(UserPoolId,
  DestinationUser, SourceUser)

Arguments

UserPoolId

[required] The user pool ID for the user pool.

DestinationUser

[required] The existing user in the user pool that you want to assign to the external IdP user account. This user can be a local (Username + Password) Amazon Cognito user pools user or a federated user (for example, a SAML or Facebook user). If the user doesn't exist, Amazon Cognito generates an exception. Amazon Cognito returns this user when the new user (with the linked IdP attribute) signs in.

For a native username + password user, the ProviderAttributeValue for the DestinationUser should be the username in the user pool. For a federated user, it should be the provider-specific user_id.

The ProviderAttributeName of the DestinationUser is ignored.

The ProviderName should be set to Cognito for users in Cognito user pools.

All attributes in the DestinationUser profile must be mutable. If you have assigned the user any immutable custom attributes, the operation won't succeed.

SourceUser

[required] 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 value that matches a claim in the ID token, or that your app retrieves from the userInfo endpoint. 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 admin_link_provider_for_user request.

For SAML, the ProviderAttributeName can be any value that matches a claim in the SAML assertion. To link SAML users based on the subject of the SAML assertion, map the subject to a claim through the SAML IdP and set that claim name as the value of ProviderAttributeName in your admin_link_provider_for_user request.

For both OIDC and SAML users, when you set ProviderAttributeName to Cognito_Subject, Amazon Cognito will automatically parse the default unique identifier found in the subject from the IdP token.

Value

An empty list.

Request syntax

svc$admin_link_provider_for_user(
  UserPoolId = "string",
  DestinationUser = list(
    ProviderName = "string",
    ProviderAttributeName = "string",
    ProviderAttributeValue = "string"
  ),
  SourceUser = list(
    ProviderName = "string",
    ProviderAttributeName = "string",
    ProviderAttributeValue = "string"
  )
)