HTTP 401 Unauthorized

In short: Login is required for the resource, or the credentials are invalid.

In more detail: The server does not know who you are (missing or wrong authentication).

In Depth

Possible causes

• Not logged in or session expired.
• Wrong password, expired token or invalid API key.

Solutions

1. Log in again.
2. Renew the token, check the Authorization header.
3. Check credentials and validity.

See also: HTTP 403 Forbidden, API Keys, Authentication