title: key authorisation test case by JSON.strongify in JMEter
body: <p>I testing authorisation in JMeter.
  Authorisation is by key, who is send in JSON.stringify.
  first is open connected by web socket,
  next send is key in json format.</p>
  
  <p>how is the best way to testing is? what test case could be?
  i think set happy path, and next authentication failed and in this give 
  1. missing key - what testing/ set this in jmeter ?
  2.bad key - not exist - what set this in jmeter?</p>
  
  <p>what could be addicted test case/?
  what testing authentication in jmeter?</p>