<b-form @submit="onSubmit" >
          <b-form-group id="exampleInputGroup1" label="Username:" label-for="exampleInput1">
            <b-form-input id="exampleInput1" type="username" v-model="form.username" required placeholder="Enter username"></b-form-input>
          </b-form-group>
          <b-form-group id="exampleInputGroup2" label="Password:" label-for="exampleInput2">
            <b-form-input id="exampleInput2" type="password" v-model="form.password" required placeholder="Enter password"></b-form-input>
          </b-form-group>
          <b-button type="submit" variant="primary">Login</b-button>
          <b-button type="reset" variant="secondary">Register</b-button>
        </b-form>