signIn() {
        const session_url = 'http://127.0.0.1:5000/signin'

        axios.get(session_url, {}, {
            auth: {
              username: this.email,
              password: this.password
            }
        }).then(response => {
          console.log('Authenticated')
          console.log(response.data)
          /*this.$store.dispatch('signin', response.data)*/
        }).catch(error => {
          console.log('Error on Authentication')
          this.error = error
          console.log(error)
        });
    }

curl -u Hans:testing -i -X GET http://127.0.0.1:5000/signin

HTTP/1.0 200 OK
Content-Type: application/json
Content-Length: 180
Access-Control-Allow-Origin: *
Server: Werkzeug/0.14.1 Python/3.6.4
Date: Sat, 22 Sep 2018 14:22:37 GMT

{
    "token": "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9...."
}

axios.get(session_url, {params : {username: 'x',  password:'y'}}).then()

from flask import request

@app.route('/signin', methods=['GET', 'POST'])
def login():
    if request.method == 'POST':
        return do_the_login()
    else:
        return show_the_login_form()

signIn() {
        //check code
        console.log("email",this.email);
        console.log("pass", this.password);
        const session_url = 'http://127.0.0.1:5000/signin'
        axios.get(session_url, {}, {
            auth: {
              username: this.email,
              password: this.password
            }
        }).then(response => {
          console.log(response);
          //console.log('Authenticated')
          //console.log(response.data)
          /*this.$store.dispatch('signin', response.data)*/
        }).catch(error => {
          console.log('Error on Authentication')
          this.error = error
          console.log(error)
        });
    }

signIn() {
        const session_url = 'http://127.0.0.1:5000/signin'
        var username = this.email
        var password = this.password
        axios({
            method: 'get',
            url: session_url,
            auth: {
              username: username,
              password: password
            }
        })
        .then(response => {
          console.log('Authenticated')
          console.log(response.data)
          /*this.$store.dispatch('signin', response.data)*/
        }).catch(error => {
          console.log('Error on Authentication')
          this.error = error
          console.log(error)
        });
    }