Create language-specific examples

[francescobianco]

Summary

The repository currently provides only cURL examples. To improve developer adoption and reduce integration time, we should provide ready-to-run examples in the most commonly used programming languages and API tooling ecosystems.

Proposed languages and tools

Create example folders for:

Language / Tool	Folder
cURL	examples/curl
PHP	examples/php
JavaScript (Node.js)	examples/javascript
TypeScript	examples/typescript
Python	examples/python
Java	examples/java
C# (.NET)	examples/csharp
Go	examples/go
Ruby	examples/ruby
Rust	examples/rust
Bash	examples/bash
Postman	examples/postman

Example coverage

Each language should include examples for:

• Authentication using HTTP Basic Auth
• Generate a token
• Retrieve token details
• Update token limits
• Refresh a token
• List wallet transactions
• Retrieve usage statistics
• Inspect subscriptions
• Inspect callback logs
• Error handling examples

Acceptance criteria

• A dedicated folder exists for each language/tool listed above.
• Every example is self-contained and runnable.
• Credentials are loaded from environment variables.
• Each folder contains a README with execution instructions.
• Examples are aligned with the current OAuth V2 API specification.
• CI validates that example snippets remain synchronized with the API documentation.

Additional notes

Priority should be given to:

1. PHP
2. JavaScript
3. TypeScript
4. Python
5. Java
6. C#

These languages are expected to cover the majority of API consumers and provide the highest immediate value.