Function get_usage 

pub fn get_usage() -> Result<UsageData, Error>

Fetch current Claude API usage data.

This is the main entry point for the crate. It:

1. Retrieves credentials from platform-specific storage
2. Calls the Anthropic usage API
3. Returns typed usage data

Example

use claude_usage::get_usage;

let usage = get_usage()?;
println!("5h utilization: {}%", usage.five_hour.utilization);
println!("7d utilization: {}%", usage.seven_day.utilization);

Errors

Returns Error if:

• Credentials are not found or expired
• API call fails
• Response parsing fails