<p>A query to filter users by user name. Remember the following about the <code>Userids</code> and <code>Query</code> parameters:</p> <ul> <li> <p>If you don't use either parameter, the API returns a paginated list of all users on the site.</p> </li> <li> <p>If you use both parameters, the API ignores the <code>Query</code> parameter.</p> </li> <li> <p>The <code>Userid</code> parameter only returns user names that match a corresponding user ID.</p> </li> <li> <p>The <code>Query</code> parameter runs a "prefix" search for users by the <code>GivenName</code>, <code>SurName</code>, or <code>UserName</code> fields included in a <a href="https://docs.aws.amazon.com/workdocs/latest/APIReference/API_CreateUser.html">CreateUser</a> API call. For example, querying on <code>Ma</code> returns Márcia Oliveira, María García, and Mateo Jackson. If you use multiple characters, the API only returns data that matches all characters. For example, querying on <code>Ma J</code> only returns Mateo Jackson.</p> </li> </ul>