n><span class="parameters "><span class="parameter ">key<span class="token operator">: </span><a href="../-auth-token/index.html">AuthToken</a><span class="token operator">?</span></span></span><span class="token punctuation">)</span></div><p class="paragraph">Set the application key/token to use when communicating with the Hue bridge.</p></div>  </div>
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