# User
<a name="API_UBS_User"></a>

Represents user metadata added to a Users dataset using the `PutUsers` API. For more information see [Importing users individually](https://docs.aws.amazon.com/personalize/latest/dg/importing-users.html).

## Contents
<a name="API_UBS_User_Contents"></a>

 ** userId **   <a name="personalize-Type-UBS_User-userId"></a>
The ID associated with the user.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 256.  
Required: Yes

 ** properties **   <a name="personalize-Type-UBS_User-properties"></a>
A string map of user-specific metadata. Each element in the map consists of a key-value pair. For example, `{"numberOfVideosWatched": "45"}`.  
The keys use camel case names that match the fields in the schema for the Users dataset. In the previous example, the `numberOfVideosWatched` matches the 'NUMBER\$1OF\$1VIDEOS\$1WATCHED' field defined in the Users schema. For categorical string data, to include multiple categories for a single user, separate each category with a pipe separator (`|`). For example, `\"Member|Frequent shopper\"`.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 24000.  
Required: No

## See Also
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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/personalize-events-2018-03-22/User) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/personalize-events-2018-03-22/User) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/personalize-events-2018-03-22/User)