Change the http verb of /stripe/billing from POST to GET.

[ro-tex]

PULL REQUEST

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Checklist

Review and complete the checklist to ensure that the PR is complete before assigned to an approver.

• All new methods or updated methods have clear docstrings
• Testing added or updated for new methods
• Verify if any changes impact the WebPortal Health Checks
• Approriate documentation updated
• Changelog file created

Issues Closed

Closes SKY-667

[linear]

SKY-667 Fix /stripe/billing endpoint

The old /api/stripe/billing endpoint (the one in old dashboard) used to use a GET endpoint.

The new one is a POST which performs a redirect to Stripe endpoint that only accepts GET requests — this flow doesn't work (after redirection happens, browser sends the same POST request to Stripe, which fails).

We should either make it a GET request again, or have the POST endpoint return the Stripe's billing portal URL in a JSON response, so we can redirect from the frontend.

As it is right now, I'm also not able to get the Location header from response to work around the issue.

[meeh0w]

Thanks for that 👍