The first step is to open&nbsp;<span class=""><i><b>Firebase console</b></i></span>&nbsp;with your android application and click <span class=""><i><b>Settings</b></i></span>

Click <span class="component"><i><b> Project settings </b></i></span>

Click <span class="component"><i><b> Cloud Messaging </b></i></span>

Copy&nbsp;<b>Legacy server key</b>

Go to your <b>Offito Dashboard</b> and Click <span class=""><i><b>Global</b></i></span>

Click on <b>Notifications</b> gear button

Click&nbsp;<b></b>on&nbsp;<b>Firebase FCM Server Key</b>

Paste your key into&nbsp;<span class=""><i><b>Firebase FCM Server Key</b> field</i></span>

Click <span class="component"><i><b>Save</b></i></span>

That's it. You're done.