how to set FG_API_KEY

[lizy-coding]

PS D:\code\xstudio> flutterguard scan
Error: API key required. Pass --api-key or set FG_API_KEY.

PS D:\code\xstudio> flutterguard FG_API_KEY.
flutterguard 0.1.0
Usage: flutterguard [arguments]

Global options:
-b, --base-url API base URL
(defaults to "https://api.flutterguard.dev/api/v1/api/")
-k, --api-key API key (or set FG_API_KEY)
-h, --help Show usage
-v, --version Show version

Commands:
scan Upload an APK for analysis
status Get analysis status
list List analyses
PS D:\code\xstudio>