public String getUsernamePrefix() {
        return this.usernamePrefix;
    }
<p>
The prefix that is prepended to username claims to prevent clashes with existing names. If you do not provide
this field, and <code>username</code> is a value other than <code>email</code>, the prefix defaults to
<code>issuerurl#</code>. You can use the value <code>-</code> to disable all prefixing.
</p>

@return The prefix that is prepended to username claims to prevent clashes with existing names. If you do not
        provide this field, and <code>username</code> is a value other than <code>email</code>, the prefix
        defaults to <code>issuerurl#</code>. You can use the value <code>-</code> to disable all prefixing.
aws-java-sdk-eks/src/main/java/com/amazonaws/services/eks/model/OidcIdentityProviderConfigRequest.java