Usually I use https://login.salesforce.com/services/oauth2/token as my Login Endpoint connecting via REST Api. Now a friend of mine created a Sandbox and I was wondering what the aquivalent URL is here, since using the one above I get an authorization error.
as usual, istead of
login for production use
test for sandbox.
Understanding OAuth Endpoints article confirms it.
If you’re verifying authentication on a sandbox organization, use “test.salesforce.com” instead of “login.salesforce.com” in all the OAuth endpoints listed above.