title: axios Post request returns null response
body: <p>I am facing an issue of receiving NULL response for the axios POST request I made. How do I correct this error?</p>
  
  <p>I've tried to changing multipart/form-data into x-www-form-urlencoded and multipart/x-www-form-urlencoded</p>
  
  <pre><code>async submitUser() {
    this.memberObj = {
      id: this.memberObjLocal.id,
      name: this.memberObjLocal.name,
      password: this.memberObjLocal.password,
      email: this.memberObjLocal.email,
      password: this.memberObjLocal.password,
      gender: this.memberObjLocal.gender,
      experience: this.memberObjLocal.experience,
      birth: this.memberObjLocal.birth,
      phoneNum: this.memberObjLocal.phoneNum,
      address: this.address,
      introduce: this.introduce,
      pic: this.pic
    };
    const config = {
      headers: { "Content-Type": "multipart/form-data" }
    };
    var formData = new FormData();
    for (let data in this.memberObj) {
      console.log(data); 
      formData.append(data, this.memberObj[data]);
      console.log(this.memberObj[data]); 
    }
    for (var key of formData.entries()) {
      console.log(key[0] + ", " + key[1]); 
    }
    try {
      let response = await this.$axios.$post("/users/", formData, config);
      this.$router.push("/");
      console.log(response) // null
    } catch (e) {
      console.log(e.response);
    }
  }
  </code></pre>