Function generateTokenPair

generateTokenPair(payload: TokenPayload): TokenPair
Generate both access and refresh tokens as a pair

Convenience function that creates both access and refresh tokens simultaneously using the same user payload. This is the primary function used during user authentication and token renewal operations to provide a complete token set.

The function combines generateAccessToken and generateRefreshToken to create a TokenPair object containing both tokens, ensuring consistency in token generation and simplifying authentication workflows.
Parameters
- payload: TokenPayload
  User information to encode in both tokens containing userId, email, and role properties
Returns TokenPair
Object containing both accessToken and refreshToken
Throws
When JWT_SECRET or JWT_REFRESH_SECRET environment variables are not configured
Example
```
// Generate complete token pair for user login
const payload = {
  userId: 'user-uuid-123',
  email: 'user@example.com',
  role: 'content_creator'
};

const tokens = generateTokenPair(payload);
console.log(tokens.accessToken);  // Short-lived token for API requests
console.log(tokens.refreshToken); // Long-lived token for renewal
```
Example
```
// Typical usage in authentication controller
const authResponse = {
  user: userInfo,
  tokens: generateTokenPair(tokenPayload)
};
```
- Defined in src/shared/utils/auth.ts:266