title: Put API KEY in axios
body: <p>I just started learn React but I have problem when I trying to make a request to the CoinMarketCap API with axios and tried several ways to set my API key. I have also also tried on Postman but message appears API key missing.</p>
  
  <pre class="lang-js prettyprint-override"><code>export const apiBaseURL = 'https://pro.coinmarketcap.com';
  </code></pre>
  
  <p>Tried like this</p>
  
  <pre class="lang-js prettyprint-override"><code>dispatch({ type: FETCHING_COIN_DATA })
  return axios.get(`${apiBaseURL}/v1/cryptocurrency/map`, 
  { headers = 
  { 'X-CMC_PRO_API_KEY': 'apicode', } 
  })
  </code></pre>
  
  <p>this</p>
  
  <pre class="lang-js prettyprint-override"><code>dispatch({ type: FETCHING_COIN_DATA })
  let config = { 'X-CMC_PRO_API_KEY': 'apicode' };
  return axios.get(`${apiBaseURL}/v1/cryptocurrency/map`, { headers: config })
  </code></pre>
  
  <p>and this</p>
  
  <pre class="lang-js prettyprint-override"><code>dispatch({ type: FETCHING_COIN_DATA })
  return axios.get(`${apiBaseURL}/v1/cryptocurrency/map?X-CMC_PRO_API_KEY=apicode`)
  </code></pre>
  
  <p>Thank you</p>