Go to Exmo
Log in or create a new account on https://exmo.com/.
Open account settings
Hover the profile name on the top right corner, then click "Settings".
Follow to API
Click "API" on the left menu.
Click "Generate and save"
Don't change any settings.
Name your key
When you have multiple APIs, a proper name helps to manage it.
Confirm with email
Open the email from Exmo and confirm.