I do not recognize the method GetProduct in post with axios in vuejs

my problem is my method getproductfile is not annoying me it appears that it is empty but it is showing me the list of what I have since I am uploading some files and it is very strange for me

<template>
    <div class="">

        <div class="list-traffic">
                <ul v-for="file in fileproject" :key="file.id" class="list-group">
                    <li class="list-group-item"> <span class="badge label-danger"><i class="fa fa-trash-o"></i></span></li>
                </ul>
        </div>
        <div class="row justify-content-center">
            <div class="col-md-8">
                <div class="card card-default">
                    <div class="card-header">Subir archivos del proyecto</div>
                    <div class="card-body">
                       <div class="row">
                          <div class="col-md-9">
                              <input type="file" v-on:change="onImageChange" class="form-control">
                          </div>
                          <div class="col-md-3">
                             <button class="btn btn-success btn-block" @click="postProjectfile">Subir imagen</button>
                          </div>
                       </div>
                    </div>
                </div>
            </div>
        </div>
    </div>
</template>

via Chebli Mohamed