The community member is experiencing an Error 400 when calling the Get User Data endpoint in https://docs.helicone.ai/rest/user/post-v1userquery, and has tried the request in both JavaScript and Postman. The comments suggest that the issue was due to a missing bearer token in the header, and that the time parameters should be in milliseconds instead of seconds. The final comment indicates that using Date.now() as unix microseconds and passing that to the seconds variable resolved the issue.