Verify.swift

func verifyButtonPressed() {
        let rawNumber = mobileNumberTextField.text ?? ""
        do {
            let phoneNumber = try PhoneNumber(rawNumber: rawNumber, region: "US")
            let formattedPhoneNumber = phoneNumber.toInternational()
            self.mobileNumberTextField.text = formattedPhoneNumber
            let verification = SMSVerification(applicationKey: C.APIs.SinchKey(), phoneNumber: formattedPhoneNumber)
            self.verification = verification
            startActivityIndicator()
            self.verification?.initiate { (succeeded, error) in
                
                guard succeeded else {
                    self.stopActivityIndicator()
                    print(error)
                    CrewError.PhoneNumberVerificationFailed.showAlert(self)
                    return
                }
                dispatch_async(dispatch_get_main_queue(), {
                    self.showVerifyCodeAlert()
                })
            }
        } catch {
            Analytics.log(Events.Phone_Verification_Attempted, parameters: Events.Params.action("Invalid Phone Number"))
            CrewError.InvalidPhoneNumber.showAlert(self)
        }
    }