[1188] How can i access to store from a plugin?

I'm using axios. It needs the Authorization header with bearer token on every request. The token is in the store.

import axios from 'axios'

let instance = axios.create({
  baseURL: 'http://api.docstore.dev'
})

instance.interceptors.request.use(config => {
  // How can i access this store instance below
  config.headers['Authorization'] = 'Bearer ' + store.state.accessToken

  return config
})

export default instance

Thank you!