Implicit flow with feature deployments

We are interested in deploying features to a unique domain for testing before merging into a release branch. The domain may look something like with an implicit callback to The issue we are running into is when authenticating oauth2 requires the callback URI to be whitelisted. Is there a convenient API to append Login redirect URIs and Trusted Origins to our configuration or another approach we should consider to allow for this? Thanks.

"redirect_uris": [