docs: def get_token(username, password, server):
      """Retrieve token of TonicDNS API.
  
      Arguments:
  
          usename:  TonicDNS API username
          password: TonicDNS API password
          server:   TonicDNS API server
      """
      method = 'PUT'
      uri = 'https://' + server + '/authenticate'
      token = ''
  
      authinfo = {
          "username": username,
          "password": password,
          "local_user": username}
  
      token = tonicdns_client(uri, method, token, data=authinfo)
  
      return token