i created two datetime field in odoo14 like start_time and end_time

a.py

start_time = fields.Datetime(string='Start Time', required=True)
end_time = fields.Datetime(string='End Time', required=True)

a.xml

<field name="start_time" widget="daterange" {"related_end_date": "end_time"}' required="1" decoration-danger="overlapping"/>
<field name="end_time" widget="daterange" options='{"related_start_date": "start_time"}' required="1" decoration-danger="overlapping"/>

How can i remove the seconds part only; datetime format should be the active datetime format in the database and i don't want to create or edit the active format

Please help me to fix this.

Thank you.