def addContact(self,id,name,phoneNr,group):
"""
Add a new contact to the database
id is the contact's id
name is the contact's name
phoneNr id the contact's phone number
group is the contacts group
raise ValueError if the contact is not valid
"""
cr=ContactRepository()
try:
cr.add(Contact(id,name,phoneNr,group))
except ValueError:
return False