<?xml version="1.0" encoding="utf-8"?>
<resources>

    <string name="app_name">MessagingTutorial</string>
    <string name="login_activity_label">Sinch Messaging Tutorial</string>
    <string name="username">Username</string>
    <string name="password">Password</string>

</resources>

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <string name="app_name">MessagingTutorial</string>
    <string name="login_activity_label">Sinch Messaging Tutorial</string>
    <string name="username">USERNAME</string>
    <string name="password">PASSWORD</string>

</resources>

Change username and password string to uppercase
Change username and password string to uppercase
