updatePhoto(event) {
     this.imageRow = []
     let file = event.target.files[0]
     this.imageRow.push({
       preview: window.URL.createObjectURL(file),
       image: file
     })
     let formData = new FormData()

     this.imageRow.forEach((element, index) => {
       formData = new FormData()
       formData.append('image', element.image)
       UserService.updateUserInfo(formData).then((res) => {
         this.userImage = res.data.image.medium_square_crop
       }, err => {
       })
     })
}

let postObject = {
   username: this.username,
   password: this.password
}
let data = new FormData()
Object.keys(postObject).forEach(key => data.append(key, postObject[key]))