Optionalclient_The code which you receive while using authorization code flow
Optionalcode_When we choose PKCE method to generate token, we need to pass code_verifier which is a cryptographically random string
Optionalgrant_Type of grant used in token request
Optionalredirect_Specify the url where the user needs to be redirected after successful login
Unique identifier of client app, can be found in app setting under admin ui