You can change your DTA login password if you do NOT use single sign-on.
button to display the Settings Window.
Note: unless informed otherwise by your administrator, the password must be at least eight characters long and contain the following: a combination of uppercase and lowercase letters; at least one numeric character; and at least one non-alpha-numeric character. It must NOT contain the following: three or more occurrences of the same character; a character repeated three or more times consecutively; your first name, last name, username, or organisation name.

button.