documentation/content/en/entities/error.md

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---
title: Error
description: Represents an error message.
menu:
docs:
parent: entities
---
## Example
```javascript
{
"error": "invalid_grant",
"error_description": "The provided authorization grant is invalid, expired, revoked, does not match the redirection URI used in the authorization request, or was issued to another client."
}
```
{{< hint style="info" >}}
**The most important part of an error response is the HTTP status code.** Standard semantics are followed. The body of an error is a JSON object containing more information, if available.
{{< /hint >}}
## Required attributes
### `error`
**Description:** The error message.
**Type:** String
**Version history:** Added in 0.6.0
## Optional attributes
### `error_description`
**Description:** A longer description of the error, mainly provided with the OAuth API.
**Type:** String
**Version history:** Added in 0.6.0
## Possible reasons
### 401 - Unauthorized
#### require\_authenticated\_user!
Error: This API requires an authenticated user. Appears when the instance is in secure mode, which disables all public use of API methods.
### 403 - Forbidden
#### current\_user.disabled?
Error: Your login is currently disabled. Appears when the OAuth token's authorized user has had their account disabled by a moderator.
#### !current\_user.confirmed?
Error: Your login is missing a confirmed e-mail address. Appears when the email address associated with the OAuth token's authorized user's account has not yet been confirmed.
#### !current\_user.approved?
Error: Your login is currently pending approval. Appears when the OAuth token's authorized user has signed up on an instance with approval-required registrations, and the user has not yet had their account approved by a moderator.
### 404 - Not Found
#### RecordNotFound
Error: Record not found. Appears when an entity record does not exist, or the authorized user is not within the audience of a private entity.operates on a user.
### 422 - Unprocessable Entity
#### RecordInvalid
Error: {string}. May appear when entity creation failed.
#### RecordNotUnique
Error: Duplicate record. Appears when you are trying to pin an account or status that is already pinned.
#### !current\_user
Error: This method requires an authenticated user. Appears when using an OAuth token without an authorized user \(or no token at all\), while trying to call an API method that requires a user to be processed.
## See also
{{< caption-link url="https://github.com/tootsuite/mastodon/blob/master/app/controllers/api/base_controller.rb" caption="app/controllers/api/base\_controller.rb" >}}