Step 1
For login , first you have to click on "choose API Account" in the left menu.
Step 2
Then select API account(Sandbox or Live).
Step 3
After selecting account , click "Generate Token".You will redirect to a page which shows textbox for entering user credentials.
Carefully fill your user credentials and click "Try it out" button.
Step 4
If credentials are correct, your access token will be generated and use this token for other API calls
Step 5
If not, an error message will displayed.