GET
    /currencies
  
  curl \
 --request GET 'https://rest.api.24sevenoffice.com/v1/currencies' \
 --header "Authorization: string"
        Response examples (200)
  
  [
  {
    "code": "USD",
    "rate": 1.25
  },
  {
    "code": "EUR",
    "rate": 1.12
  },
  {
    "code": "GBP",
    "rate": 1.38
  }
]