Registering dynamic webhook error via REST API

Jira Development Jira Cloud
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1

When registering a webhook using the REST API getting the below error.
Client must be authenticated to access this resource

For registering a webhook iam making a POST request to the below URL.
https://mysite.atlassian.net/rest/api/3/webhook

and passing the header with Authorization as
Basic ${Buffer.from('email@example.com:<api_token>').toString('base64')}

I have also tried the other API route
https://api.atlassian.com/ex/jira/{cloudId}/rest/api/2/webhook and i still receive the same error.

2

Registering dynamic webhooks via REST API is still being rolled out.
Try again a few weeks later. Even iam facing this issue.