insomnia/packages/insomnia-app/app/network/bearer-auth/get-header.js

// @flow
import type { RequestHeader } from '../../models/request';

export function getBearerAuthHeader(token: string, prefix: string): RequestHeader {
  const name = 'Authorization';
  const value = `${prefix || 'Bearer'} ${token}`;
  return { name, value };
}