Number of APIs: 9
1. Get balance
GET {{payment-url}}/users/{{username}}
POST {{payment-url}}/users/{{username}}/actions/estimate-charge
POST {{payment-url}}/transactions/
4. Cancel an authorized transaction
POST {{payment-url}}/transactions/{{authorization_id}}/actions/cancel
5. Capture an authorized transaction
POST {{payment-url}}/transactions/{{authorization_id}}/actions/capture
6. Refund a captured transaction
POST {{payment-url}}/transactions/{{authorization_id}}/actions/refund
7. Authentication - Get access_token from refresh_token
POST {{authentication-url}}/connect/token
8. Authentication - Introspection
POST {{authentication-url}}/connect/introspect
9. Authentication - well known
POST {{authentication-url}}/.well-known/openid-configuration