401
Client Error
401 Unauthorized
Authentication is required and has failed or not been provided.
Description
The 401 Unauthorized status code indicates that the request has not been applied because it lacks valid authentication credentials. The response must include a WWW-Authenticate header indicating the authentication scheme.
Common Causes
- Missing or expired authentication token
- Invalid API key
- Session expired
- Incorrect username or password
How to Fix
- Include valid credentials in the request
- Refresh expired tokens
- Check API key validity
- Re-authenticate if session expired
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