public CreateClientVpnEndpointRequest withAuthenticationOptions(ClientVpnAuthenticationRequest... authenticationOptions) {
        if (this.authenticationOptions == null) {
            setAuthenticationOptions(new com.amazonaws.internal.SdkInternalList<ClientVpnAuthenticationRequest>(authenticationOptions.length));
        }
        for (ClientVpnAuthenticationRequest ele : authenticationOptions) {
            this.authenticationOptions.add(ele);
        }
        return this;
    }
<p>
Information about the authentication method to be used to authenticate clients.
</p>
<p>
<b>NOTE:</b> This method appends the values to the existing list (if any). Use
{@link #setAuthenticationOptions(java.util.Collection)} or
{@link #withAuthenticationOptions(java.util.Collection)} if you want to override the existing values.
</p>

@param authenticationOptions
       Information about the authentication method to be used to authenticate clients.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/CreateClientVpnEndpointRequest.java