Step 1
Go to the Instagram Developers Tool: and press Register Your Application

Step 2
Then press Register a New Client 

Step 3
Complete fields, uncheck Disable implicit OAuth and press Register

Step 4
Use your data and follow the link 

Step 5
Press Authorize in the window that appears.

Step 6
After confirmation, you will be redirected to the website you've used on step 4. Just copy the access token.


That's all :)