accidentally disabled it she forgot her itunes accnt.help please.

hi i have an iphone4 that my daughter uses and she accidentally disabled it she forgot her itunes accnt.help please...πŸ™πŸ»πŸ™πŸ»πŸ™πŸ»πŸ™πŸ»πŸ™πŸ»πŸ™πŸ»

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0