JAVASCRIPT

fetch with bearer token

fetch('URL_GOES_HERE', { 
   method: 'post', 
   headers: new Headers({
     'Authorization': 'Basic '+btoa('username:password'), 
     'Content-Type': 'application/x-www-form-urlencoded'
   }), 
   body: 'A=1&B=2'
 });

fetch bearer token

const token = localStorage.getItem('token')

const response = await fetch(apiURL, {
        method: 'POST',
        headers: {
            'Content-type': 'application/json',
            'Authorization': `Bearer ${token}`, // notice the Bearer before your token
        },
        body: JSON.stringify(yourNewData)
    })