Retrieve Connection

Returns a single connection by its ID. The `connectionId` path parameter accepts: - Prefixed format: `conn_01965a3f2e7b7000b4c1d2e3f4a5b6c7` - Raw GUID: `01965a3f-2e7b-7000-b4c1-d2e3f4a5b6c7` - Your own `externalId`: e.g. `acme-corp`