[[File:UI_Android_LoginDialogNoPassword.jpg|thumb|alt=Password missing|Password missing]]
[[File:UI_Android_LoginDialogInvalidInput.jpg|thumb|alt=Invalid credentials entered|Invalid credentials entered]]
[[File:invalid_username.jpg|thumb|alt=Invalid username entered|Invalid username entered]]
[[File:invalid_password.jpg|thumb|alt=Invalid password entered|Invalid password entered]]
=== No user input ===
When users try to login with no input at all, the indicating message says "Please enter your username and password."