Hello, I would appreciate if someone can tell me why does cretain data is not updated in my collection. I want to have an app that saves date and time that a user starts and ends a job in our company. I have only one screen that has two buttons START and END, this buttons save the start and end of the job in the collection called ASSISTENCIA, but I want to save the hours and minutes between the start and end time, but can’t find the way (function or other) to do this, the app does not even update a different property of the database for expamle a logical property that I’m updating in the ACTION section. The only properties updates are the start and end time when the buttons are pressed 
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