What is meant?

Question

Flask

We set the task to write our own api, which performs some tasks. I
became in a stupor at this point

Add authentication to the API using API key. API key should be configurable. API key should be passed with a request as an “x-api-key” header.

Help me understand what they want from me and how to implement it

Answer 1

What exactly do you not understand? Can't translate?
An API token is required. The key must be mutable. Authorization via a token in the "x-api-key" header.
The most banal documentation of such a route: https://swagger.io/docs/specification/authenticati...