method WorkspaceService.existsUsernameimport { WorkspaceService } from "https://deno.land/x/windmill@v1.313.0/windmill-api/index.ts"; existsUsername(unnamed 0: { requestBody: { id: string; username: string; }; }): CancelablePromise<boolean>exists username Parametersunnamed 0: { requestBody: { id: string; username: string; }; }ReturnsCancelablePromise<boolean>boolean status