If you are running any external platforms that still utilise the MessageMedia SOAP API or the M4UD APIs, then you may need to create Legacy API credentials in order to facilitate new processes and workflows via those integrations.
To create Legacy API credentials
Go to Configuration, then API Settings, then scroll down to Legacy API Credentials and click on Create new key:
In the modal, enter a username for the API (aka a "key") and then a password (aka a "secret"):
Your new API key will then appear in the list where you can edit and/or delete it as required:
Deleting an API Key
Tick the box next to the key you wish to delete, and the Delete option will appear on the right:
Confirm this action in the next step to delete all selected API keys: