To setup your OpenNode Hot Wallet Rehive requires an API key with full withdrawal permissions. To do this you will need to:
Browse to the developers section of the OpenNode dashboard.
Click on Integrations.
Scroll down to API keys and click "+ Add key".
Add an applicable label and then select the "Withdrawals" permission.
The IP whitelist section can be left blank.
Complete the 2FA input and click "Generate".