Creates a new user account by validating a Google ID token. Requires a valid token and basic user information.
Google ID token obtained from client.
"eyJhbGciOiJSUzI1NiIsImtpZCI6..."
User's first name.
"Alice"
RFC3339 timestamp when user agreed to terms.
"2025-02-19T16:00:00Z"
User's last name.
"Johnson"
Account successfully created.
The response is of type string.
"Account successfully created"