Create or update a commitment

curl --request POST \
     --url https://app.amberflo.io/payments/pricing/amberflo/customer-commitment/upfront_commitment_by_usage \
     --header 'accept: application/json' \
     --header 'content-type: application/json' \
     --data '{
     "type": "upfront_commitment_by_usage",
     "reward": {
     "value": "",
     "label": ""
     },
     "trueup": {
     "minimumPayment": "",
     "interval": ""
     },
     "exitClauses": {
     "type": "termination_grace_period",
     "gracePeriodInDays": 0
     }
     }'