Tranfer board between 2 account trello

Make sure that you are admin of these boards.
Example I want tranfer board from A to B account because using A account is not safe, someone can access to it.

• Login to Trello account A, go to board and add new user (add B)
• Login to Trello account B, now you are having board in your account.
• In B account, create a copy of that board (in case A remove you)