title: Salesforce Integration INVALID_SESSION_ID using Postman
body: <p>When hitting <a href="https://login.salesforce.com/services/oauth2/token" rel="noreferrer">https://login.salesforce.com/services/oauth2/token</a>, using Postman.</p>
  
  <p><strong>POST <a href="https://login.salesforce.com/services/oauth2/token" rel="noreferrer">https://login.salesforce.com/services/oauth2/token</a></strong></p>
  
  <p><a href="https://i.stack.imgur.com/KE2YE.png" rel="noreferrer"><img src="https://i.stack.imgur.com/KE2YE.png" alt="enter image description here"></a></p>
  
  <p><strong>Response:</strong></p>
  
  <p><a href="https://i.stack.imgur.com/4s0Yu.png" rel="noreferrer"><img src="https://i.stack.imgur.com/4s0Yu.png" alt="enter image description here"></a></p>
  
  <p>I receive a token, but when I try to do something as simple as GET /limits,</p>
  
  <p><strong>GET <a href="https://na73.salesforce.com/services/data/v45.0/limits" rel="noreferrer">https://na73.salesforce.com/services/data/v45.0/limits</a></strong></p>
  
  <p><a href="https://i.stack.imgur.com/g7nDM.png" rel="noreferrer"><img src="https://i.stack.imgur.com/g7nDM.png" alt="enter image description here"></a></p>
  
  <p>the response is:</p>
  
  <pre><code>[
      {
          "message": "Session expired or invalid",
          "errorCode": "INVALID_SESSION_ID"
      }
  ]
  </code></pre>
  
  <p>The strange thing is that when I change all my credentials to a free "developer account" created with a different email address, everything works fine.  All requests and headers are the exact same, with the exception of the values from either account.</p>
  
  <p>After digging through a lot of threads on here I thought that maybe my production account (the one I'm posting from now) was not API ENABLED.  It turns out my production account is API ENABLED.</p>
  
  <p>I also tried changing <a href="https://login.salesforce.com/services/oauth2/token" rel="noreferrer">https://login.salesforce.com/services/oauth2/token</a> to <a href="https://na73.salesforce.com/services/oauth2/token" rel="noreferrer">https://na73.salesforce.com/services/oauth2/token</a> as some threads have suggested, but that just times out.</p>
  
  <p>When comparing both account permissions, they seem identical and I've confirmed I have no issues with the credentials (client id, client secret, security token, access-token), all of them seem to be copied in correctly.</p>
  
  <p>Any ideas for a salesforce noob?</p>