Answers for "how to create an axios instance with headers"

header in axios

axios.post('url', {"body":data}, {
    headers: {
    'Content-Type': 'application/json'
    }
  }
)

axios.post headers example

axios.post(
'https://example.com/postSomething', 
{ // this is the body
 email: varEmail, 
 password: varPassword
},
{
  headers: {
    Authorization: 'Bearer ' + varToken
  }
})