feat: factor in get businesses endpoint and reflect on readme

Author: idorenyinudoh

README.md

@@ -56,6 +56,10 @@ let user = thepeer.indexUser("Thor Odin", "thor", "thor@odin.com");
         - link_id (string)
         - amount (integer)
     - `returns`: object
+* getBusinesses
+    - `accepts`:
+        - channel (string)
+    - `returns`: object
 
 ## Extra
 

lib/Thepeer.js

@@ -157,6 +157,25 @@ class Thepeer {
       Helper.processError(e)
     }
   }
+
+  /**
+   * Get a list of all integrated businesses and their respective images
+   * @param {string} channel - Channel type (send, checkout, direct_charge)
+   * @returns {JSON} A JSON response containing the details of the businesses
+   * @memberof Thepeer
+   */
+  async getBusinesses (channel) {
+    try {
+      let url = '/businesses'
+      if (channel.length !== 0) {
+        url += `?channel=${channel}`
+      }
+      const response = await this.request.get(url)
+      return response.data
+    } catch (e) {
+      Helper.processError(e)
+    }
+  }
 }
 
 module.exports = Thepeer