Hi there,

I'm developing an integration between my app and a Salesforce Instance for a customer.

I have it working nicely when connecting to my Developer account (logging in at https://login.salesforce.com)

I have just created a Sandbox account from my client's Salesforce account with the aim to test and deploy. The problem is that when I make an authentication attempt via REST API to the sandbox endpoint (https://test.salesforce.com), I get back the error 'retry your request'. Obviously, I've retried and no-go.

To check I changed the password and it correctly tells me that the credentials are incorrect, so it's not that.

I'm not quite sure what else I'm doing wrong as my code works fine on the developer account.

I have read many forum articles, and tried a number of suggestions to no avail. I tried changing the login endpoint from login.sales... to cs31.salesfor... as per my sandbox instance.

Any suggestions would be very much appreciated.