refactor: Slack authentication by passing flow, connection and step

packages/backend/src/apps/slack/client/endpoints/verify-access-token.ts

@@ -0,0 +1,35 @@
+import { IJSONObject } from '@automatisch/types';
+import qs from 'qs';
+import SlackClient from '../index';
+
+export default class VerifyAccessToken {
+  client: SlackClient;
+
+  static requestOptions: IJSONObject = {
+    headers: {
+      'Content-Type': 'application/x-www-form-urlencoded',
+    },
+  };
+
+  constructor(client: SlackClient) {
+    this.client = client;
+  }
+
+  async run() {
+    const response = await this.client.httpClient.post(
+      '/auth.test',
+      qs.stringify({
+        token: this.client.connection.formattedData.accessToken,
+      }),
+      VerifyAccessToken.requestOptions
+    );
+
+    if (response.data.ok === false) {
+      throw new Error(
+        `Error occured while verifying credentials: ${response.data.error}.(More info: https://api.slack.com/methods/auth.test#errors)`
+      );
+    }
+
+    return response.data;
+  }
+}