code: def write_netrc(host, entity, key):
      
      if len(key) != 40:
          click.secho(
              'API-key must be exactly 40 characters long: {} ({} chars)'.format(key, len(key)))
          return None
      try:
          normalized_host = host.split("/")[-1].split(":")[0]
          print("Appending key for %s to your netrc file: %s" %
                (normalized_host, os.path.expanduser('~/.netrc')))
          machine_line = 'machine %s' % normalized_host
          path = os.path.expanduser('~/.netrc')
          orig_lines = None
          try:
              with open(path) as f:
                  orig_lines = f.read().strip().split('\n')
          except (IOError, OSError) as e:
              pass
          with open(path, 'w') as f:
              if orig_lines:
                  # delete this machine from the file if it's already there.
                  skip = 0
                  for line in orig_lines:
                      if machine_line in line:
                          skip = 2
                      elif skip:
                          skip -= 1
                      else:
                          f.write('%s\n' % line)
              f.write(textwrap.dedent("""\
              machine {host}
                login {entity}
                password {key}
              """).format(host=normalized_host, entity=entity, key=key))
          os.chmod(os.path.expanduser('~/.netrc'),
                   stat.S_IRUSR | stat.S_IWUSR)
          return True
      except IOError as e:
          click.secho("Unable to read ~/.netrc", fg="red")
          return None
docs: Add our host and key to .netrc