<v-btn-toggle v-model="toggle_one">
<v-btn flat>
CAD50
</v-btn>
<v-btn flat>
CAD100
</v-btn>
<v-btn flat>
CAD1000
</v-btn>
<v-btn flat>
CAD10000
</v-btn>
Users can only select one option. How can I retrieve the value of the selected button?