Break this.

1 #Login and username.
  2 print("Register please.")
  3 username = input("Username: ")
  4 password = input("Password: ")
  5 print("Program is now locked, input username and password")
  6 bravo_response = None
  7 charlie_response = None
  8 while bravo_response != username:
  9     bravo_response = input("Username: ")
 10     if bravo_response != username:
 11         print("Incorrect")
 12 while charlie_response != password:
 13     charlie_response = input("Password: ")
 14     if charlie_response != password:
 15         print("Incorrect")
 16 print("Login Correct")
 17
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