# Invocation

13. You can trigger the Truecaller profile verification dialog anywhere in your app flow by calling the following method

```
TcSdk.getInstance().getAuthorizationCode(this);
```

In case isOAuthFlowUsable() method returns false, implying that Truecaller app is not present on the device, you can take the user to your app screen and continue with the verification flow for non-Truecaller users.


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