Laravel vue js mixins not getting function response

I am using laravel 5.8 with vue js. I have created a generalized function for post/get requests. The problem is, i am not getting the mixins function response. Here is my code :

TestComponent.vue

import GeneralMixin from '../mixins.js';
export default {
    mixins: [ GeneralMixin ],
    methods:{
        login: function (e) {
            response = this.testMixin();
            console.log(response);
        }
    }
}

mixin.js

export default {
    methods: {
        testMixin: function () {
            url = '/test';
            axios.post(url).then(function(response, status, request) {  
                return response;
            });
        }
    }
}

I am not getting response of function testMixin() . Can anyone help please

via Chebli Mohamed