This service gives a merchant the PhonePe's user details corresponding to a grant token. This can be used to facilitate Single Sign-On in the merchant's system as the user details have already been verified by PhonePe.

{
  "merchantId": "merchantId",  
  "grantToken": "GRTXXXXX" 
}

{
  "request": "ewoJIm1lcmNoYW50SWQiOiAibWVyY2hhbnRJZCIsICAKICAgICAgICAiZ3JhbnRUb2tlbiI6ICJHUlRYWFhYWCIgCn0K"
}