public String getUserArn() {
        return this.userArn;
    }
<p>
The Amazon Resource Name (ARN) of an individual environment member to get information about. If no value is
specified, information about all environment members are returned.
</p>

@return The Amazon Resource Name (ARN) of an individual environment member to get information about. If no value
        is specified, information about all environment members are returned.
aws-java-sdk-cloud9/src/main/java/com/amazonaws/services/cloud9/model/DescribeEnvironmentMembershipsRequest.java