title: concatenate & Hex 256sha Hash a Signature
body: <p>I am trying to create a request in postman that pulls some parameters and puts them in the proper order and then hashes in sha256 hex. I understand I need to use a pre-request script but am struggling with what to use and how to get parameters in the script.</p>
  
  <p>Example of the concatenate string - hex_sha256('[session:Key][session:Password][session:Sent][session:UnitAgencyTypeId][session:UnitName][session:UserInit][session:UserName][session:UserSub][session:Secret]')")]</p>
  
  <p>Any help would be really appreciated</p>