There is a solution to filter in REST requests without using the Query API. You can use the "queries" parameter in the URL to filter the results. For example, to filter by email, you can use:
https://cloud.appwrite.io/v1/users?queries[]=equal("email", "myemail.@gmail.com"). Here is the documentation for more information: <https://appwrite.io/docs/rest> and <https://appwrite.io/docs/server/users?sdk=rest-default#usersList>.