in src/main/scala/com/gu/invoicing/refundErroneousPayment/Impl.scala [14:22]
def getAccountBalance(accountId: String): BigDecimal = {
Http(s"$zuoraApiHost/v1/accounts/$accountId")
.header("Authorization", s"Bearer $accessToken")
.asString
.body
.pipe(read[Account](_))
.metrics
.balance
}