So I have a flow that we use via button and it takes the  contactID related to a community user. I want to run the flow whenever the community user logs in. I have tried to run a PB that should fire on last login field on user which doesnt work. When a user logs in it creates a record in the userLogin object, is there any way to use that in PB or flow ?

So I have a flow that we use via button and it takes the  contactID related to a community user. I want to run the flow whenever the community user logs in. I have tried to run a PB that should fire on last login field on user which doesnt work. When a user logs in it creates a record in the userLogin object, is there any way to use that in PB or flow ?