Test REST API with Dev account

[Lee11]

Hi Experts

I have created a Dev account which has given me a Dev instance. I have customised the Incident record and created some test data. I now wish to test accessing the list of Incidents via the REST API.

I am trying to authenticate over https://[myinstance].service-now.com/oauth_token.do to get a token. I need to pass in user credentials when I do this. My dev account credentials dont work (they are essentially like community credentials). When I access my dev instance I do it from a  button on the Dev login page that says "Start Building". This logs me in as System Administrator. I dont actually know the credentials (ie. username and password) behind this login. I cant seem to reset any user logins and I cant seem to create a new login.

What credential can I use with a dev instance to test the REST API?

Thanks for any advice.  

[Lee11]

Actually I found a section on the developer page that shows your admin username and password. So that given me a login I can use. However Postman is still returning "access denied".

Ankur - I will check your instructions to see if i can get the admin user working 

[Sai Kumar B]

In the user profile you can change your password in the password field you can try that in your profile