# MemberId


An object containing the identifier of a group member.

## Contents


**Important**  
This data type is a UNION, so only one of the following members can be specified when used or returned.

 ** UserId **   <a name="singlesignon-Type-MemberId-UserId"></a>
An object containing the identifiers of resources that can be members.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 47.  
Pattern: `([0-9a-f]{10}-|)[A-Fa-f0-9]{8}-[A-Fa-f0-9]{4}-[A-Fa-f0-9]{4}-[A-Fa-f0-9]{4}-[A-Fa-f0-9]{12}`   
Required: No

## See Also


For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/identitystore-2020-06-15/MemberId) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/identitystore-2020-06-15/MemberId) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/identitystore-2020-06-15/MemberId)