gnature-symbol">;</span><br/>    <a class="tsd-kind-property" href="ConfigurationParameters.html#apikey">apiKey</a><span class="tsd-signature-symbol">?:</span><br/>        <span class="tsd-signature-symbol">|</span> <span class="tsd-signature-type">string</span><br/>        <span class="tsd-signature-symbol">|</span> <span class="tsd-signature-type">Promise</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">string</span><span class="tsd-signature-symbol"