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Using the properties tool window, configure the buttons to call onClick methods named sendCode(), resendCode(), verifyCode() and signOut() respectively.
Starting at the top widget and working down, configure the ID property for each view to statusText, phoneText, sendButton, resendButton, codeText, verifyButton and signoutButton.
== Performing Initialization Tasks ==
Finally, a failed verification attempt will result in a call to the onVerificationFailed() method where code has been added to differentiate between an invalid credential and the SMS quota being exceeded.
== Verifying the Code ==