samples/login-sample/src/main/java/com/uber/sdk/android/samples/LoginSampleActivity.java
private void validateConfiguration(SessionConfiguration configuration) {
        String nullError = "%s must not be null";
        String sampleError = "Please update your %s in the gradle.properties of the project before " +
                "using the Uber SDK Sample app. For a more secure storage location, " +
                "please investigate storing in your user home gradle.properties ";

        checkNotNull(configuration, String.format(nullError, "SessionConfiguration"));
        checkNotNull(configuration.getClientId(), String.format(nullError, "Client ID"));
        checkNotNull(configuration.getRedirectUri(), String.format(nullError, "Redirect URI"));
        checkState(!configuration.getClientId().equals("insert_your_client_id_here"),
                String.format(sampleError, "Client ID"));
        checkState(!configuration.getRedirectUri().equals("insert_your_redirect_uri_here"),
                String.format(sampleError, "Redirect URI"));
    }
private void validateConfiguration(SessionConfiguration configuration) {
        String nullError = "%s must not be null";
        String sampleError = "Please update your %s in the gradle.properties of the project before " +
                "using the Uber SDK Sample app. For a more secure storage location, " +
                "please investigate storing in your user home gradle.properties ";

        checkNotNull(configuration, String.format(nullError, "SessionConfiguration"));
        checkNotNull(configuration.getClientId(), String.format(nullError, "Client ID"));
        checkNotNull(configuration.getRedirectUri(), String.format(nullError, "Redirect URI"));
        checkState(!configuration.getClientId().equals("insert_your_client_id_here"),
                String.format(sampleError, "Client ID"));
        checkState(!configuration.getRedirectUri().equals("insert_your_redirect_uri_here"),
                String.format(sampleError, "Redirect URI"));
    }
Validates the local variables needed by the Uber SDK used in the sample project
@param configuration