let Author: Sequelize.Model<AuthorInstance, AuthorAttributes>
let findOrCreateAuthor: AuthorMethods.FindOrCreateAuthor
-export default function defineAuthor (sequelize: Sequelize.Sequelize, DataTypes) {
+export default function defineAuthor (sequelize: Sequelize.Sequelize, DataTypes: Sequelize.DataTypes) {
Author = sequelize.define<AuthorInstance, AuthorAttributes>('Author',
{
name: {