public void setAuthenticationType(String authenticationType) {
        this.authenticationType = authenticationType;
    }
<p>
The authentication type for the user. You must specify USERPOOL.
</p>

@param authenticationType
       The authentication type for the user. You must specify USERPOOL.
@see AuthenticationType
aws-java-sdk-appstream/src/main/java/com/amazonaws/services/appstream/model/CreateUserRequest.java