Your first redirect URL should still be auth.tray.io/oauth2/token
followed by acme.integration-authentication.com/oauth2/token
in second place. If the service doesn't support more than one redirect URL, check out two workarounds here.
The above URL will replace the redirect URI query parameter in the config wizard/auth-only domain when your end users configure their solution instances.
If you wish to have your self-hosted redirect URL, please contact support as it would require setup from our side.
Parameterization allows you to provide the values for fields like Client Id, Client Secret and the API url at the time of creating authentications. It adds:
reusability as you can use different OAuth apps in different integrations by creating a single service
security as you don't have to expose the values in the services page and you will only feed them while creating the auth.
Here's an example on how it can make your service reusable:
Shopify has custom URL for domains, you can parameterize the url in the OAuth 2 settings by passing a placeholder as: {{shopify_url}}
Now you can add the same placeholder value below in the 'Authentication parameters' section
NOTE: The unique property key has to match the placeholder value you passed in the settings.