@Distort7047 said:
Disable Api key
Hi, I want to disable my api key . I have deleted my old account and have created a new one.

If the API Key you want to deactivate was for the account you deleted, then it was automatically deactivated.
Please test using the API Key of the deleted account to verify.

And check this link,
https://www.themoviedb.org/settings/api
if your new account has an API Key.