Cannot Select KEY_PAIR from Auth Drop-Down Menu

Issue

The following error appears when selecting KEY_PAIR from the Auth drop-down menu:

You submitted a request that we don't support. Reach out to our support team for help.

Answer

1. Check that you have ----BEGIN KEY---- and ----END KEY---- signifiers at the start and end of your private key.
2. Make sure the private key contains no spaces.

Cause

Without the correct formatting, we are not able to access the private key.