Hi.
If your vue3 code is not served by the same domain as your django API (i.e. localhost:8000), you may be facing a cross domain issue.
If so, to ensure session cookie is sent in subsequent requests after login, you need to set withCredentials attribute to true in the request. E.g.
axios.post('http://localhost:8000/settings/getinfo/', { withCredentials: true })
You may also enforce this behaviour for every request by setting
axios.defaults.withCredentials
You’ll also have to correcty set CORS settings on django side (see Be logged in mutiple sites - #13 by antoinehumbert)
But, as stated by Ken, checking requests/responses headers from your browser should help in identifying the root cause of the problem