Personalised Error Messages

[VatsKan]

Personalised Error messages (possibly in universal error handler middleware). Would be helpful to know as a user what the status codes mean with a personalied error message (e.g. if i get a 400 status code on trying to add a new post because I don't have a token, perhaps an "unauthorised" message. or if I have tried to send a post request with no body, a different error message.)