Use instance on fetchWithInstance instead of this.axios and remove method from FortniteAPIError

src/exceptions/FortniteAPIError.ts

@@ -5,11 +5,6 @@ import { FortniteAPIErrorData } from '../http/httpStructs';
  * Represets a Fortnite-API HTTP error
  */
 class FortniteAPIError extends Error {
-  /**
-   * The HTTP method
-   */
-  public method: string;
-
   /**
    * The URL of the requested API endpoint
    */
@@ -35,7 +30,6 @@ class FortniteAPIError extends Error {
     this.name = 'FortniteAPIError';
     this.message = error.error;
 
-    this.method = request.method!.toUpperCase();
     this.url = request.url!;
     this.httpStatus = status;
     this.requestParams = request.params;

src/http/HTTP.ts

@@ -43,7 +43,7 @@ class HTTP {
     };
 
     try {
-      const response = await this.axios(config);
+      const response = await instance(config);
 
       return response.data;
     } catch (e) {