How to use JMeter for login authentication?

How to use JMeter for login authentication?

Regular Expression Extractor is used to handle this situation. Following steps may be used,

  1. First find out the GET request where the authentication required & POST request that posts the credential to login
  2. The response from the GET request should have tokens which needs to be be extracted and sent as a parameter in the POST request.
  3. Add a Regular Expression Extractor to store these tokens and include the tokens as parameter in the POST request