post https://backstage.taboola.com/backstage/oauth/token
a. Client submits client_id,client_secret, usernameand password to the token endpoint.
b. Server returns an Access Token and Refresh Token.
The
Content-Typefor this request isapplication/x-www-form-urlencoded.
Because the user needs to submit his credentials, the Password Credentials flow is generally not recommended.
Note
A Refresh Token is returned.