Nest.js - Pass data from Guard to #UploadFile - nestjs

Question

Reference Answer: https://stackoverflow.com/a/61407264/8518207
The author of the above answer mentions you can clone the request object before modifying it in your guard.
How can this be done?
My Goal: Guard will basically verify if the auth token is valid before proceeding to doing anything in the controller such as call FileInterceptor or print those console logs. if token is guard is verified, the FileInterceptor should be used to extract the file from the request.
Example Code:
#Put(':uid')
#UseGuards(AuthGuard)
#UseInterceptors(
FileInterceptor('file', {
storage: diskStorage({
destination: './.tmp',
filename: editFileName,
}),
fileFilter: fileFilter,
}),
)
public async update(
#Req() req,
#UploadedFile() file,
) {
this.logger.log('update')
console.log('in controller')
console.log('req', req)
console.log('file', file)
}
async canActivate(context: ExecutionContext): Promise<boolean> {
const request = context.switchToHttp().getRequest()
const response = context.switchToHttp().getResponse()
const postMulterRequest: any = await new Promise((resolve, reject) => {
const multerReponse = multer().any()
multerReponse(request, response, err => {
const user_uid = request.body.user_uid
if (err) reject(err)
resolve(request)
})
})
if (request) {
// some validations happen here....
request.body = postMulterRequest.body
request.user = await this.validateToken(request.headers.cookie, user_uid)
return true
} else {
return true
}
}