public String getUserName() {
        return this.userName;
    }
<p>
The name or alias of the user or role that issued the session. This value is null if the credentials were
obtained from a root account that doesn't have an alias.
</p>

@return The name or alias of the user or role that issued the session. This value is null if the credentials were
        obtained from a root account that doesn't have an alias.
aws-java-sdk-macie2/src/main/java/com/amazonaws/services/macie2/model/SessionIssuer.java