Lists information about all identity providers for a user pool.Show details from next link. https://docs.aws.amazon.com/ja_jp/cli/latest/reference/cognito-idp/list-identity-providers.html
| aws cognito-idp list-identity-providers --user-pool-id |
| Creating and Managing a SAML Identity Provider for a User Pool (AWS CLI and AWS API) - Amazon Cognito : http://docs.aws.amazon.com/cognito/latest/developerguide/cognito-user-pools-managing-saml-idp-cli-api.html |