Function isApiError

isApiError(error: unknown): error is APIError
Type guard to check if the error is an API error.
Parameters
- error: unknown
  The error to check.
Returns error is APIError
- True if the error is an API error, false otherwise.
Example
```
try {
  ...
}
catch (error) {
  if (isApiError(error)) {
    // Handle API error
    console.log(error.errorMessage);
  }
}
```