# Authentication

> Fix requests that return 500 without credentials or 403 Forbidden: the API key header, deleted keys, Base64 encoding of Basic credentials and PHP SDK errors.

- **Product:** ReportingCloud
- **Section:** Documentation
- **Kind:** Topic
- **Path:** ReportingCloud > Troubleshooting > Authentication
- **Web URL:** https://docs.textcontrol.com/reporting-cloud/troubleshooting/authentication/
- **LLMs URL:** https://docs.textcontrol.com/reporting-cloud/troubleshooting/authentication/llms.txt
- **LLMs-Full URL:** https://docs.textcontrol.com/reporting-cloud/troubleshooting/authentication/llms-full.txt

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## On This Page

- [Test the Credentials on Their Own](https://docs.textcontrol.com/reporting-cloud/troubleshooting/authentication/#test-the-credentials-on-their-own)
- [See What the Request Sends](https://docs.textcontrol.com/reporting-cloud/troubleshooting/authentication/#see-what-the-request-sends)
- [A Request Without Credentials Returns 500](https://docs.textcontrol.com/reporting-cloud/troubleshooting/authentication/#a-request-without-credentials-returns-500)
- [Requests Return 403 Forbidden](https://docs.textcontrol.com/reporting-cloud/troubleshooting/authentication/#requests-return-403-forbidden)
- [Basic Authentication Fails](https://docs.textcontrol.com/reporting-cloud/troubleshooting/authentication/#basic-authentication-fails)
- [The PHP SDK Reports Missing Credentials](https://docs.textcontrol.com/reporting-cloud/troubleshooting/authentication/#the-php-sdk-reports-missing-credentials)
- [Related Pages](https://docs.textcontrol.com/reporting-cloud/troubleshooting/authentication/#related-pages)

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## Nearby

- **Previous:** [Troubleshooting](https://docs.textcontrol.com/reporting-cloud/troubleshooting/llms.txt)
- **Next:** [Quotas and Limits](https://docs.textcontrol.com/reporting-cloud/troubleshooting/quotas-limits/llms.txt)