headers = {'Authorization' => 'Basic bMyAuthKeydv4K'}
HTTParty.get(
  "https://unicom24.ru/api/partners/requests/v1/locality/",
  :headers => headers
)

@response=#<Net::HTTPUnauthorized 401 Unauthorized readbody=true>

auth = {username: 'user', password: 'pass'}

result = HTTParty.get(
  "https://unicom24.ru/api/partners/requests/v1/locality/",
  basic_auth: auth
)