Почему ошибка при работе плагина?

<template >
  <div class = "app" >
  <input v-model.trim = "login" >
  </div>
  </template>

  <script>
import {validationMixin} from 'vuelidate'
import {required} from 'vuelidate/lib/validators'
export default {
  mixins: [validationMixin],


  data() {
    return {
      count: 1,
      login: '',
    }
  },
  validations: {
    login: {required },
  },

} 
</script>