def image_repositories_callback(ctx, param, provided_value):
    """
    Create an dictionary of function logical ids to ECR URIs.
    :param ctx: Click Context
    :param param: Param name
    :param provided_value: Value provided by Click, after being processed by ImageRepositoriesType.
    :return: dictionary of function logic ids to ECR URIs.
    """

    image_repositories = {}
    for value in provided_value:
        image_repositories.update(value)

    return image_repositories if image_repositories else None