public String getUsernameClaim() {
        return this.usernameClaim;
    }
<p>
The JSON Web Token (JWT) claim to use as the username. The default is <code>sub</code>, which is expected to be a
unique identifier of the end user. You can choose other claims, such as <code>email</code> or <code>name</code>,
depending on the OIDC identity provider. Claims other than <code>email</code> are prefixed with the issuer URL to
prevent naming clashes with other plug-ins.
</p>

@return The JSON Web Token (JWT) claim to use as the username. The default is <code>sub</code>, which is expected
        to be a unique identifier of the end user. You can choose other claims, such as <code>email</code> or
        <code>name</code>, depending on the OIDC identity provider. Claims other than <code>email</code> are
        prefixed with the issuer URL to prevent naming clashes with other plug-ins.
aws-java-sdk-eks/src/main/java/com/amazonaws/services/eks/model/OidcIdentityProviderConfigRequest.java