const state = {
  return {
    form: new Form({
        id:null,
        fullname: null,
        username: null,
        email: null,
        password: null,
        role:null,
      })
   }
}

const actions = {
     toreData({commit,state},payload){
    commit('LOADING');
    return new Promise((resolve, reject)=>{
        let params = _.cloneDeep(state.form)

        state.form.post(APP_CONFIG.API_URL+'/users',params)
        .then(response =>{
            commit('RESET_STATE')
            resolve();
        })
        .catch(error =>{
        });
    });
  }
}

<div class="form-group">
       <label for="fullname">Full Name*</label>
        <input type="text" :class="{ 'is-invalid': form.errors.has('fullname') }" :value="form.fullname" @input="updateFullname" autocomplete="off" placeholder="Full Name" class="form-control" name="fullname" id="fullname">
        <has-error :form="form" field="fullname"></has-error>
        </div>