title: Using WooCommerce API filter by product SKU
body: <p>I'm trying to retrieve product info from WooCommerce using their API.</p>
  
  <p>I'm sending an request using the following URL: <code>{url}/wp-json/wc/v2/products?filter[sku]=10008&amp;consumer_key={key}&amp;consumer_secret={key}</code>. However, the response I receive, contain various products, which have no relation whatsoever to SKU=10008. </p>
  
  <p>I'm wondering why this filter, dosen't isolate the response, only containing products filtered by my specified SKU? Am I using the API wrong?</p>
  
  <p>For instance, this is my response (only printing the SKU):</p>
  
  <pre><code>pCb0760
  pCb0855
  pHn4000
  pCh0900
  pCb0752
  pVg0210
  pTa0111
  pTa0110
  pTa0101
  pTa0100
  pGd0130
  pGd0120
  pGd0110
  pTa0120
  pEg0030
  pSu1015
  pNd0400
  pF27z
  pF27w
  pF27bb
  pF27b
  pF14z
  pF14w
  pF14bb
  pF14b
  pSp0360
  pPa0300
  pHp0100
  pEk0400
  pAb1665
  pAs0100z
  pLt0210
  pLt0200
  pLt0100
  pCs0822
  pIg0912
  pIg0911
  pIg0910
  pIg0902
  pIg0901
  pIg0900
  pIg0802
  pIg0801
  pIg0800
  pIg0190
  pIg0187
  pIg0186
  pIg0185
  pIg0171
  pIg0170
  pIg0132
  pIg0101
  pHi1081
  pHi1080
  pHi1013
  pHi1012
  pHi1011
  pHi1010
  </code></pre>
  
  <p>I really can't see any correlation between my request and this response...</p>