'Constructor for AppAssertionCredentials
Args:
scope: string or list of strings, scope(s) of the credentials being
requested.'

@util.positional(2)
def __init__(self, scope, **kwargs):

    if (type(scope) is list):
        scope = '    '.join(scope)
    self.scope = scope
    super(AppAssertionCredentials, self).__init__('ignored')
