google api - Using OAuth 2 in Postman for Save to Android Pay API -

i've seen these questions using postman in order invoke google's api oauth 2:

using postman access oauth 2.0 google apis

could not obtain google oauth 2 token on postman

and many more, have client id , client secret.

for 'save android pay' api, got .p12 key , issuer id. have service account email address defiantly no client id or secret. think have auth url i'm not sure: https://www.googleapis.com/auth/wallet_object.issuer

looking in save android pay api, doesn't client id i'm not sure how i'm supposed obtain token in postman have.

so question is: giving .p12 key, issuerid , service account email address, need fill in postman oauth 2 fields:

token name, auth url, access token url, client id, client secret, scope (optional), grant type

to obtain oauth 2.0 client credentials, need register application google api console specify in basic steps , you'll client id , client secret.