== Accessing login dialog ==
[[File:UI_Android_LoginButtonInStartMenu.jpg|thumb|alt=Login button in the start menu|Login button in the start menu]]
Near the bottom of the start menu which users see immediately after launching {{UBIK }} application, there is a {{key press|Login}} button. Clicking it opens the Login Dialoglogin dialog.{{Clear}}
== Logging in ==
[[File:UI_Android_LoginDialog.jpg|thumb|alt=Login dialog|Login dialog]]
In the login dialog, users can provide their credentials in order to identify themselves. If the authentication is successful, the dialog will be dismissed and users will have access to all the {{UBIK }} features. Otherwise, the error details will be given in the dialog.
=== Logging in with the current UBIK settings ===
[[File:UI_Android_LoginProgressDialog.jpg|thumb|alt=Login dialogUser authentication in progress|Login dialogUser authentication in progress]]If all the UBIK setting values are already configured correctly before login, users can simply click the {{key press|Login}} button in the dialog. During the time of authentication, there will be a progress dialog displayed. Once users' identities are confirmed, both dialogs will be dismissed.
=== Logging in with a selected [[Preset]] ===
[[File:UI_Android_LoadPresetDuringLogin.jpg|thumb|alt=Login dialogSelecting a preset before login|Login dialogSelecting a preset before login]]It is also possible to specify a collection of setting values to use during before login. In this case, simply click the {{key press|Load Preset}} button. A preset selection dialog will then be shown.After choosing the desired preset, users can click the {{key press|Login}} button in the selection dialog to trigger the authentication. {{Clear}}
== Authentication messages ==
[[File:UI_Android_LoginDialogNoInput.jpg|thumb|alt=Before any user input|Before any user input]]
[[File:UI_Android_LoginDialogNoPassword.jpg|thumb|alt=Password missing|Password missing]]
[[File:UI_Android_LoginDialogInvalidInput.jpg|thumb|alt=Invalid credentials entered|Invalid credentials entered]]
=== No user input ===
[[File:UI_Android_LoginDialogNoInputWhen there is no user input at all, the indicating message says "Please enter your username and password.jpg|thumb|alt=Login dialog|Login dialog]]"
=== Password missing ===
[[File:UI_Android_LoginDialogNoPasswordWhen users try to login with only usernames but not passwords, the indicating message says "Type the password for this account.jpg|thumb|alt=Login dialog|Login dialog]]"
=== Invalid user credentials ===
[[File:UI_Android_LoginDialogInvalidInputWhen the usernames and/or password being used are/is invalid, the indicating message says "The username or password isn't valid.jpg|thumb|alt=Login dialog|Login dialog]]Please try again."