text: # Copyright 2018 GCP Instance Watcher authors.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  """
      This module contains the implementation of authentication managing components.
  """
  
  import json
  
  from google.oauth2 import service_account
  
  from lib.lab_keeper.config import Config
  
  
  class Authenticator:
      """
          Manages GCP credentials.
      """
  
      def __init__(self):
          """Initialze parameters"""
          self.config = Config()
          self.credentials_path = self.config.credentials
  
      def make_credentials(self):
          """Creates GCP credentials from a JSON key file"""
          with open(self.credentials_path) as source:
              info = json.load(source)
  
          credentials = service_account.Credentials.from_service_account_info(
              info)
  
          return credentials
  