hidden username

Hi Sakin, Please help me : I have a question please: How can i hidden username front side ? this is a big bug. What must i do to fix that ? i used the password protected under visibility , but this is not good because my customers must write the password two times when login. How can i fix that please ? and the same time each user is redirect to a specified page , which is a good plugin can do recommend it ? please, i need your help and tips. Best regards Ashraf