Authorization is better written in dot notation

Question

I faced a problem in my mern app. how to fix it. thank

src\utils\setAuthToken.js
  Line 5:35:  ["Authorization"] is better written in dot notation  dot-notation
  Line 7:42:  ["Authorization"] is better written in dot notation  dot-notation

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my code:

import axios from 'axios';

const setAuthToken = (token) => {
  if (token) {
    axios.defaults.headers.common['Authorization'] = `Bearer ${token}`;
  } else {
    delete axios.defaults.headers.common['Authorization'];
  }
};
export default setAuthToken;