# AwsOpenSearchServiceDomainMasterUserOptionsDetails
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Specifies information about the master user of the domain. 

## Contents
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 ** MasterUserArn **   <a name="securityhub-Type-AwsOpenSearchServiceDomainMasterUserOptionsDetails-MasterUserArn"></a>
The Amazon Resource Name (ARN) for the master user.   
Type: String  
Pattern: `.*\S.*`   
Required: No

 ** MasterUserName **   <a name="securityhub-Type-AwsOpenSearchServiceDomainMasterUserOptionsDetails-MasterUserName"></a>
The username for the master user.   
Type: String  
Pattern: `.*\S.*`   
Required: No

 ** MasterUserPassword **   <a name="securityhub-Type-AwsOpenSearchServiceDomainMasterUserOptionsDetails-MasterUserPassword"></a>
The password for the master user.   
Type: String  
Pattern: `.*\S.*`   
Required: No

## See Also
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For more information about using this API in one of the language-specific Amazon SDKs, see the following:
+  [Amazon SDK for C\$1\$1](https://docs.amazonaws.cn/goto/SdkForCpp/securityhub-2018-10-26/AwsOpenSearchServiceDomainMasterUserOptionsDetails) 
+  [Amazon SDK for Java V2](https://docs.amazonaws.cn/goto/SdkForJavaV2/securityhub-2018-10-26/AwsOpenSearchServiceDomainMasterUserOptionsDetails) 
+  [Amazon SDK for Ruby V3](https://docs.amazonaws.cn/goto/SdkForRubyV3/securityhub-2018-10-26/AwsOpenSearchServiceDomainMasterUserOptionsDetails)