const validateRegistration = async (otpSession, otp) => {
  try {
    const response = await fetch('https://api.weir.ai/auth/validate/registration', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ otpSession, otp })
    });
    
    if (!response.ok) {
      throw new Error(`HTTP error! status: ${response.status}`);
    }
    
    const data = await response.json();
    return data.data;
  } catch (error) {
    console.error('Validation error:', error);
    throw error;
  }
};

// Usage
const verificationData = await validateRegistration('otp_session_123456789', '123456');
console.log('User verified:', verificationData.userId);