added usage

README.md

@@ -6,6 +6,10 @@
 
 This project aims to simplify bank data used by developers for Fintech APIs (Flutterwave and Paystack). Paystack uses `bank_code` to process transfers to accounts while Flutterwave uses `bank_slug` for the same operation. As a bonus, bank logos are also returned. How is this useful? -- can be used to spice up your bank dropdown/list UI, It doesn't have to be boring.
 
+## Usage
+
+Make a get request to `https://nigerianbanks.xyz`
+
 ## Prerequisites
 * [Go](https://golang.org) installed on your machine
 * [Docker](https://docker.com) installed on your machine (optional)