diff --git a/api/src/controllers/drive.ts b/api/src/controllers/drive.ts
index ddf4e7c..bf4b494 100644
--- a/api/src/controllers/drive.ts
+++ b/api/src/controllers/drive.ts
@@ -153,7 +153,7 @@ export class DriveController {
 }
 
 const getFileTree = () => {
-  const tree = new ExecutionController().buildDirectorytree()
+  const tree = new ExecutionController().buildDirectoryTree()
   return { status: 'success', tree }
 }
 
diff --git a/api/src/controllers/internal/Execution.ts b/api/src/controllers/internal/Execution.ts
index 3d54ea4..f1106f4 100644
--- a/api/src/controllers/internal/Execution.ts
+++ b/api/src/controllers/internal/Execution.ts
@@ -5,11 +5,15 @@ import { readFile, fileExists, createFile, moveFile } from '@sasjs/utils'
 import { PreProgramVars, TreeNode } from '../../types'
 import { generateFileUploadSasCode, getTmpFilesFolderPath } from '../../utils'
 
+export interface ExecutionVars {
+  [key: string]: string | number | undefined
+}
+
 export class ExecutionController {
   async executeFile(
     programPath: string,
     preProgramVariables: PreProgramVars,
-    vars: { [key: string]: string | number | undefined },
+    vars: ExecutionVars,
     otherArgs?: any,
     returnJson?: boolean
   ) {
@@ -29,7 +33,7 @@ export class ExecutionController {
   async executeProgram(
     program: string,
     preProgramVariables: PreProgramVars,
-    vars: { [key: string]: string | number | undefined },
+    vars: ExecutionVars,
     otherArgs?: any,
     returnJson?: boolean
   ) {
@@ -55,6 +59,7 @@ export class ExecutionController {
         `${computed}%let ${key}=${vars[key]};\n`,
       ''
     )
+
     const preProgramVarStatments = `
 %let _sasjs_tokenfile=${tokenFile};
 %let _sasjs_username=${preProgramVariables?.username};
@@ -138,7 +143,7 @@ ${program}`
       : webout
   }
 
-  buildDirectorytree() {
+  buildDirectoryTree() {
     const root: TreeNode = {
       name: 'files',
       relativePath: '',
diff --git a/api/src/controllers/internal/FileUploadController.ts b/api/src/controllers/internal/FileUploadController.ts
index 53d42de..506e5a0 100644
--- a/api/src/controllers/internal/FileUploadController.ts
+++ b/api/src/controllers/internal/FileUploadController.ts
@@ -18,7 +18,7 @@ export class FileUploadController {
 
   //It will intercept request and generate unique uuid to be used as a subfolder name
   //that will store the files uploaded
-  public preuploadMiddleware = async (req: any, res: any, next: any) => {
+  public preUploadMiddleware = async (req: any, res: any, next: any) => {
     let session
 
     const sessionController = getSessionController()
diff --git a/api/src/controllers/stp.ts b/api/src/controllers/stp.ts
index b0f78ac..fd94ce7 100644
--- a/api/src/controllers/stp.ts
+++ b/api/src/controllers/stp.ts
@@ -1,7 +1,7 @@
 import express from 'express'
 import path from 'path'
 import { Request, Security, Route, Tags, Post, Body, Get, Query } from 'tsoa'
-import { ExecutionController } from './internal'
+import { ExecutionController, ExecutionVars } from './internal'
 import { PreProgramVars } from '../types'
 import { getTmpFilesFolderPath, makeFilesNamesMap } from '../utils'
 
@@ -66,7 +66,7 @@ const executeReturnRaw = async (
   req: express.Request,
   _program: string
 ): Promise<string> => {
-  const query = req.query as { [key: string]: string | number | undefined }
+  const query = req.query as ExecutionVars
   const sasCodePath =
     path
       .join(getTmpFilesFolderPath(), _program)
diff --git a/api/src/routes/api/session.ts b/api/src/routes/api/session.ts
index 436f0b2..09d0d87 100644
--- a/api/src/routes/api/session.ts
+++ b/api/src/routes/api/session.ts
@@ -1,6 +1,5 @@
 import express from 'express'
 import { SessionController } from '../../controllers'
-import { authenticateAccessToken } from '../../middlewares'
 
 const sessionRouter = express.Router()
 
diff --git a/api/src/routes/api/stp.ts b/api/src/routes/api/stp.ts
index 1ca4a18..9879a7c 100644
--- a/api/src/routes/api/stp.ts
+++ b/api/src/routes/api/stp.ts
@@ -1,5 +1,5 @@
 import express from 'express'
-import { executeProgramRawValidation, runSASValidation } from '../../utils'
+import { executeProgramRawValidation } from '../../utils'
 import { STPController } from '../../controllers/'
 import { FileUploadController } from '../../controllers/internal'
 
@@ -26,7 +26,7 @@ stpRouter.get('/execute', async (req, res) => {
 
 stpRouter.post(
   '/execute',
-  fileUploadController.preuploadMiddleware,
+  fileUploadController.preUploadMiddleware,
   fileUploadController.getMulterUploadObject().any(),
   async (req: any, res: any) => {
     const { error: errQ, value: query } = executeProgramRawValidation(req.query)