SSO Compliant Fetch Calls

[mcclurec]

Description

When making fetch calls for data to populate special tiles like Pi-Hole, we should include any credentials stored as cookies for the domain. This enables support for multiple subdomains fronted by a single sign one auth provider. e.g. homer.example.com tries to reach out to get data from pihole.example.com, where both of these share a common auth provider. Without including credentials in the fetch, the call would fail as it would get redirected to login.example.com

Fixes # (issue): N/A

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• I've read & comply with the contributing guidelines
• I have tested my code for new features & regressions on both mobile & desktop devices, using the latest version of major browsers.
• I have made corresponding changes the documentation (README.md).
• I've checked my modifications for any breaking changes, especially in the config.yml file

[bastienwirtz]

Hey @mcclurec, thanks for contributing. credentials: "include" should help with auth proxies, let's merge that!