S1-Task-003-Handling information about managers

[alesevbar]

Airline managers are the people responsible for managing flights. The system must handle the following information about managers: an identifier number (unique, pattern "^[A-Z]{2-3}\d{6}$", where the first two or three letters correspond to their initials), years of experience in the airline, his or her date of birth and an optional link to a picture that must be stored somewhere else.