Use autocomplete attribute to identify input purpose

https://www.w3.org/WAI/WCAG21/Understanding/identify-input-purpose.html

Success Criterion 1.3.5 Identify Input Purpose (Level AA): The purpose of each input field collecting information about the user can be programmatically determined when:

• The input field serves a purpose identified in the Input Purposes for User Interface Components section; and
• The content is implemented using technologies with support for identifying the expected meaning for form input data.

Allow setting autocomplete attribute for mform elements to a value from the taxonomy here: https://www.w3.org/TR/WCAG21/#input-purposes