Wordpress upload multiple image using custom endpoint rest api (ionic as enduser)

I want to upload multiple image to wordpress using ionic(angularjs).With custom endpoint rest api.

I tryed using ionic file transfer but its not working.The api endpoint was “example.com/wp-json/wc/v2/media” it says “Sorry, you are not allowed to create posts as this user”

Thats why i want use custom endpoint restapi and file path save into usermeta data

Any solution ???Or Advise

i can implement it with ionic3

1- use camera v4 with ionic3
2- use binary file to upload
3- decrease quality of camera via option
4- use jwt plugin to authentication
5- use http.post method
i hadnt any experience with filetransfer but of use this plugin please use version 4 with ionic3

6- if you want you can use pods plugin for create new entities and add them into your wordpress you can search youtube and find 9 videos by Baljeet Singh