docs: def _add_bearer_token(self, *args, **kwargs):
          """Add a bearer token to the request uri, body or authorization header.
  
          This is overwritten to change the headers slightly.
          """
          s = super(TwitchOAuthClient, self)
          uri, headers, body = s._add_bearer_token(*args, **kwargs)
          authheader = headers.get('Authorization')
          if authheader:
              headers['Authorization'] = authheader.replace('Bearer', 'OAuth')
          return uri, headers, body