i got this error in the terminal when trying to execute curl command (a POST request) how can fix this error (sidenotes: i'm still new to flask)

Question

HTTP/1.0 400 BAD REQUEST Content-Type: application/json Content-Length: 93 Server: Werkzeug/1.0.1 Python/3.8.5 Date: Sat, 02 Jan 2021 06:20:16 GMT<