Gets information about a specific identity provider.Show details from next link. https://docs.aws.amazon.com/ja_jp/cli/latest/reference/cognito-idp/describe-identity-provider.html
| aws cognito-idp describe-identity-provider --user-pool-id |
| Specifying Identity Provider Attribute Mappings for Your User Pool - Amazon Cognito : http://docs.aws.amazon.com/cognito/latest/developerguide/cognito-user-pools-managing-saml-idp-cli-api.html |