curl --request POST \
  --url https://sandbox-api.cardcore.cloud/institutions/oauth/token \
  --header 'Content-Type: application/json' \
  --data '
{
  "grant_type": "client_credentials",
  "institutionId": "{{institutionId}}",
  "client_assertion_type": "urn:ietf:params:oauth:client-assertion-type:jwt-bearer",
  "client_assertion": "paste-client-assertion-jwt-here"
}
'

{}