diff --git a/src/routes/tasks.ts b/src/routes/tasks.ts
index 6a7303f..de068b7 100644
--- a/src/routes/tasks.ts
+++ b/src/routes/tasks.ts
@@ -17,6 +17,7 @@ type TRequest = {
     task: ExportTask,
     url: string,
     timeZoneName: string,
+    apiKey: string,
   },
 };
 
@@ -66,6 +67,11 @@ async function addTask(req: TRequest, res) {
     res.status(400).send('"task" field is required');
     return;
   }
+  const apiKey = body.apiKey;
+  if (_.isEmpty(apiKey)) {
+    res.status(400).send('"apiKey" field is required');
+    return;
+  }
 
   try {
     validateGrafanaUrl(clientUrl);
@@ -87,15 +93,16 @@ async function addTask(req: TRequest, res) {
   }
 
   const exporter = exporterFactory.getExporter();
-  exporter.export(task, datasourceUrl, body.timeZoneName);
+  exporter.export(task, datasourceUrl, body.timeZoneName, apiKey);
   res.status(200).send(`Export process started`);
 }
 
 async function deleteTask(req, res) {
-  let taskId = req.body.taskId;
-  let csvFilePath = path.join(CSV_PATH, `${taskId}.csv`);
-  let jsonFilePath = path.join(CSV_PATH, `${taskId}.json`);
-
+  const taskId = req.body.taskId;
+  const jsonFilePath = path.join(CSV_PATH, `${taskId}.json`);
+  const data = fs.readFileSync(jsonFilePath, 'utf8');
+  const csvName = JSON.parse(data)['filename'];
+  const csvFilePath = path.join(CSV_PATH, `${csvName}.csv`);
   if(fs.existsSync(csvFilePath)) {
     fs.unlink(csvFilePath, err => console.error(err));
   }
diff --git a/src/services/exporter.ts b/src/services/exporter.ts
index 85605f6..7c4c2e3 100644
--- a/src/services/exporter.ts
+++ b/src/services/exporter.ts
@@ -29,7 +29,7 @@ const DEFAULT_PROGRESS = {
 export class Exporter {
   private _task: ExportTask;
 
-  public async export(task: ExportTask, datasourceUrl: string, timeZoneName: string) {
+  public async export(task: ExportTask, datasourceUrl: string, timeZoneName: string, apiKey: string) {
     try {
       this._task = _.cloneDeep(task);
       this._task.id = uuidv4();
@@ -72,9 +72,6 @@ export class Exporter {
         let values = [];
 
         for(const queryConfig of queryConfigs) {
-          const host = new URL(datasourceUrl).origin;
-          const apiKey = getApiKey(host);
-
           const datasourceMetrics = await queryByConfig(queryConfig, datasourceUrl, from, to, apiKey);
 
           if(_.isEmpty(columns)) {
@@ -117,15 +114,15 @@ export class Exporter {
     const csvStream = csv.createWriteStream({ headers: true, delimiter: this._task.csvDelimiter })
       .on('error', async e => await this._updateProgress({ status: ExportStatus.ERROR, errorMessage: e.message }));
 
-    const writableStream = fs.createWriteStream(this._getFilePath('csv'));
+    const writableStream = fs.createWriteStream(this._getCsvFilePath());
 
     csvStream.pipe(writableStream);
     writableStream.on('finish', async () => {
       if(this._task.progress.status !== ExportStatus.ERROR) {
-        console.log(`Everything is written to ${this._getFilename('csv')}`);
+        console.log(`Everything is written to ${this._getCsvFilename()}`);
         await this._updateProgress({ status: ExportStatus.FINISHED, progress: 1 });
       } else {
-        console.log(`${this._getFilename('csv')} export is finished with error`);
+        console.log(`${this._getCsvFilename()} export is finished with error`);
       }
     });
 
@@ -141,7 +138,7 @@ export class Exporter {
         progress: _.assign(this._task.progress, progress, { time }),
       };
 
-      await promisify(fs.writeFile)(this._getFilePath('json'), JSON.stringify(data), 'utf8');
+      await promisify(fs.writeFile)(this._getJsonFilePath(), JSON.stringify(data), 'utf8');
     } catch(err) {
       console.error(err);
       throw new Error('Can`t write file');
@@ -174,12 +171,16 @@ export class Exporter {
     }
   }
 
-  private _getFilename(extension: string): string {
-    return `${this._task.filename}.${extension}`;
+  private _getCsvFilename(): string {
+    return `${this._task.filename}.csv`;
   }
 
-  private _getFilePath(extension: string): string {
-    let filename = this._getFilename(extension);
+  private _getCsvFilePath(): string {
+    let filename = this._getCsvFilename();
     return path.join(CSV_PATH, filename);
   }
+
+  private _getJsonFilePath(): string {
+    return path.join(CSV_PATH, `${this._task.id}.json`);
+  }
 }