fix: correct use of this in wrong context

dist/adapter.esm.js

@@ -6,8 +6,8 @@ import axios from 'axios';
  */
 class Adapter {
   constructor(protocol, config) {
-    this.config = config;
     this.protocol = protocol;
+    this.config = config;
     this.axios = axios;
     this.validator = new Validator(protocol.schema);
     this.auth();
@@ -68,11 +68,12 @@ class Adapter {
    * @returns {object}
    */
   auth() {
+    let config = this.config;
     return this.axios
-      .get(`${this.config.api}/token`, {
+      .get(`${config.api}/token`, {
         params: {
-          client_id: this.config.client_id,
-          secret: this.config.secret,
+          client_id: config.client_id,
+          secret: config.secret,
         },
       })
       .then((response) => {
@@ -88,9 +89,10 @@ class Adapter {
    * @returns {object}
    */
   poll() {
+    let config = this.config;
     return this.getAuthorizationHeader()
       .then((headers) => {
-        return this.axios.get(`${this.config.api}/receive`, {
+        return this.axios.get(`${config.api}/receive`, {
           headers,
         });
       })
@@ -116,10 +118,11 @@ class Adapter {
    * @returns 
    */
   publish(topic, body) {
+    let config = this.config;
     return this.getAuthorizationHeader()
       .then((headers) => {
         return this.axios.post(
-          `${this.config.api}/send`,
+          `${config.api}/send`,
           {
             topic,
             body,
@@ -146,10 +149,11 @@ class Adapter {
    * @returns 
    */
   broadcast(body) {
+    let config = this.config;
     return this.getAuthorizationHeader()
       .then((headers) => {
         return this.axios.post(
-          `${this.config.api}/notify`,
+          `${config.api}/notify`,
           {
             body,
           },

dist/adapter.js

@@ -8,8 +8,8 @@ var axios = require('axios');
  */
 class Adapter {
   constructor(protocol, config) {
-    this.config = config;
     this.protocol = protocol;
+    this.config = config;
     this.axios = axios;
     this.validator = new Validator(protocol.schema);
     this.auth();
@@ -70,11 +70,12 @@ class Adapter {
    * @returns {object}
    */
   auth() {
+    let config = this.config;
     return this.axios
-      .get(`${this.config.api}/token`, {
+      .get(`${config.api}/token`, {
         params: {
-          client_id: this.config.client_id,
-          secret: this.config.secret,
+          client_id: config.client_id,
+          secret: config.secret,
         },
       })
       .then((response) => {
@@ -90,9 +91,10 @@ class Adapter {
    * @returns {object}
    */
   poll() {
+    let config = this.config;
     return this.getAuthorizationHeader()
       .then((headers) => {
-        return this.axios.get(`${this.config.api}/receive`, {
+        return this.axios.get(`${config.api}/receive`, {
           headers,
         });
       })
@@ -118,10 +120,11 @@ class Adapter {
    * @returns 
    */
   publish(topic, body) {
+    let config = this.config;
     return this.getAuthorizationHeader()
       .then((headers) => {
         return this.axios.post(
-          `${this.config.api}/send`,
+          `${config.api}/send`,
           {
             topic,
             body,
@@ -148,10 +151,11 @@ class Adapter {
    * @returns 
    */
   broadcast(body) {
+    let config = this.config;
     return this.getAuthorizationHeader()
       .then((headers) => {
         return this.axios.post(
-          `${this.config.api}/notify`,
+          `${config.api}/notify`,
           {
             body,
           },

src/adapter/index.js

@@ -6,8 +6,8 @@ import axios from 'axios';
  */
 export class Adapter {
   constructor(protocol, config) {
-    this.config = config;
     this.protocol = protocol;
+    this.config = config;
     this.axios = axios;
     this.validator = new Validator(protocol.schema);
     this.auth();
@@ -68,11 +68,12 @@ export class Adapter {
    * @returns {object}
    */
   auth() {
+    let config = this.config;
     return this.axios
-      .get(`${this.config.api}/token`, {
+      .get(`${config.api}/token`, {
         params: {
-          client_id: this.config.client_id,
-          secret: this.config.secret,
+          client_id: config.client_id,
+          secret: config.secret,
         },
       })
       .then((response) => {
@@ -88,9 +89,10 @@ export class Adapter {
    * @returns {object}
    */
   poll() {
+    let config = this.config;
     return this.getAuthorizationHeader()
       .then((headers) => {
-        return this.axios.get(`${this.config.api}/receive`, {
+        return this.axios.get(`${config.api}/receive`, {
           headers,
         });
       })
@@ -116,10 +118,11 @@ export class Adapter {
    * @returns 
    */
   publish(topic, body) {
+    let config = this.config;
     return this.getAuthorizationHeader()
       .then((headers) => {
         return this.axios.post(
-          `${this.config.api}/send`,
+          `${config.api}/send`,
           {
             topic,
             body,
@@ -146,10 +149,11 @@ export class Adapter {
    * @returns 
    */
   broadcast(body) {
+    let config = this.config;
     return this.getAuthorizationHeader()
       .then((headers) => {
         return this.axios.post(
-          `${this.config.api}/notify`,
+          `${config.api}/notify`,
           {
             body,
           },