[<reference> location change pin authorization]-> [<input> Please enter your PIN]
[Please enter your PIN]-> [<choice> is authorized]
[is authorized]-> yes [save user information]
[save user information]-> [<reference> complete]
[is authorized]-> no [<choice> is blocked]
[is blocked]-> yes [<label> exit pin blocked]
[is blocked]-> no [increase failed attempts]
[increase failed attempts]-> [Please enter your PIN]