You can now add a custom OIDC - providers with Amazon Cognito

Amazon Cognito makes it convenient for the developers to add OIDC providers that are not built currently to the service console like Ping identity and salesforce. Length sign-up form makes it difficult for the conversion of the users and registration process. The users can now log in with the existing OpenID account into the user pool with the new Cognito feature. With the new feature of the Amazon Cognito eradicates the need for the new users to create a site or app-specific passwords and user names.