# 40100: Unauthorized

Identifier: `unauthorized`



A connection or request was rejected because it was not authorized.

## What you should do

Read the accompanying message: 40100 is a general authorization failure, and the message states the specific action that was refused. Grant the credential the capability it needs, or perform the operation with credentials that have it.

## Why it happens

An operation was refused because the credentials in use don't permit it. This covers a range of cases, from a request for a resource or property the key has no capability for, to an attempt to modify a field that can't be changed.

## What you'll see

The error is reported with code 40100 and HTTP status 401. The message names the specific problem, for example `Not authorized` or `Non-permitted property ...`.