fix: throwing relevant errors in token skills

[bluntbrain]

Description

This addresses the issue where users were being charged even when operations failed. Now when an API call fails, an exception will be thrown, preventing any charges.

Type of Change

• [ ] Bugfix
• [ ] New Feature
• [x] Improvement
• [ ] Documentation Update

Checklist

• [x] I have read the contributing guidelines.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.