Follow the instructions below:

1. sign-in into your account on 

2. Click on "Account"

3. Click on "Security" then select "API access"

4. Click on "New API Key"

5. In Permissions, Tick "Account Balance" and "User Transactions" 

6. Click on "Generate Key"

7. Copy-Paste the API Key, the API Secret to enter them one by one in the app

How to link your Bitstamp Account