title: Performance testing with Locust with mocking 3rd party API
body: <p>I came across an issue with performance testing of payments-related endpoints.
  Basically I want to test some endpoints that make request themselves to a 3rd-party providers' API.
  Is it possible from Locust's tests level to mock those 3rd-party API for the endpoints I intend to actually test (so without interference with the tested endpoints)?</p>