refactor: use a single axios instance and remove redundant code

lib/utils/Request.js

@@ -0,0 +1,54 @@
+'use strict';
+
+const Axios = require('axios');
+const Utils = require('./Utils');
+const Constants = require('./Constants');
+const Controller = new AbortController();
+
+class Request {
+  constructor (session) {
+    this.session = session;
+ 
+    this.instance = Axios.create({
+      baseURL: Constants.URLS.YT_BASE_API + session.version,
+      headers: Constants.INNERTUBE_HEADERS_BASE,
+      params: { key: session.key },
+      timeout: 15000
+    });
+    
+    this.#setupInterceptor();
+    
+    return this.instance;
+  }
+  
+  #setupInterceptor() {
+    this.instance.interceptors.request.use((config) => {
+      const is_ytmusic = config.data.includes(Constants.URLS.YT_MUSIC);
+      
+      config.headers['accept-language'] = `en-${this.session.config.gl || 'US'}`;
+      config.headers['x-goog-visitor-id'] = this.session.context.client.visitorData || ''
+      config.headers['x-youtube-client-version'] = this.session.context.client.clientVersion;
+      config.headers['x-origin'] = is_ytmusic && Constants.URLS.YT_MUSIC || Constants.URLS.YT_BASE;
+      config.headers['origin'] = is_ytmusic && Constants.URLS.YT_MUSIC || Constants.URLS.YT_BASE;
+      
+      is_ytmusic && (config.baseURL = Constants.URLS.YT_MUSIC_BASE_API + this.session.version);
+   
+      if (this.session.logged_in) {
+        const cookie = this.session.config.cookie;
+  
+        const token = cookie 
+          && this.session.auth_apisid 
+          || this.session.access_token;
+        
+        config.headers.cookie = cookie || '';
+        config.headers.authorization = cookie && token || `Bearer ${token}`;
+        
+        !cookie && (delete config.params.key);
+      }
+      
+      return config;
+    }, (error) => Promise.reject(error));
+  }
+}
+
+module.exports = Request;