feat: use custom request instead of popsicle

src/o-auth-client.ts

@@ -1,7 +1,27 @@
 import ClientOAuth2 from 'client-oauth2'
 import { Options } from 'client-oauth2'
+import fetch, { Headers } from 'cross-fetch'
 import { defaultsDeep } from 'lodash'
 
+const request: ClientOAuth2.Request = async (method, url, body, headerRecord): ReturnType<ClientOAuth2.Request> => {
+  const headers = new Headers()
+  headers.append('Accept-Encoding', 'application/json') // disable compression
+  Object.keys(headerRecord).map(key => headers.append(key, headerRecord[key] as string))
+
+  const req: RequestInit = {
+    method,
+    headers,
+    body,
+  }
+
+  const res = await fetch(url, req)
+
+  return {
+    status: res.status,
+    body: await res.text(),
+  }
+}
+
 export class OAuthClient {
   // https://advertising.amazon.com/API/docs/v2/guides/authorization
   private readonly amazonOptions: Options = {
@@ -10,9 +30,9 @@ export class OAuthClient {
     scopes: ['cpc_advertising:campaign_management'],
   }
 
-  private readonly client = new ClientOAuth2(defaultsDeep({}, this.opts, this.amazonOptions))
+  private readonly client = new ClientOAuth2(defaultsDeep({}, this.opts, this.amazonOptions), request)
 
-  public constructor(private readonly opts: Options) {}
+  public constructor(private readonly opts: Options) { }
 
   public get getUri() {
     return this.client.code.getUri.bind(this)