The else {
Callback (' account can contain only Numbers, letters or use email, please input again! ')
//this. Form. SetFieldsValue ({the username: ' ',})
}
Want to do a check for the login user name, can prompt, but also want to join a empty account operation, to join the callback after the prompt can't scarlet letter message is at the bottom of the account name can only appear in the console, not to join this empty normal hint, excuse me what method both