Setting an initial user for pickerFieldUser

Question

When creating a new record with a user field, I want the field the field to initially be set to the current logged in user.  I need to be able to clear that field and select a different user if applicable. 
In all of the functional variations I've tried, I can set a default value, but it will not allow me to change the selection.  If I click the X to clear the selection, it just repopulates with the logged-in user. 
I've tried variations of the following:
a!pickerFieldUsers(
label: "User", labelPosition: "ABOVE", maxSelections: 1, value: if (
isnull(ri!record['recordType!{...}BWTA Event.fields.{...}user']), loggedInUser(), ri!record['recordType!{...}BWTA Event.fields.{...}user']
), saveInto: ri!record['recordType!{...}BWTA Event.fields.{...}user'], required: true, validations: {}
),
I've reviewed many discussion threads, but either my available options do not match or they do not pertain to the create action.  
I reviewed this recipe, linked in a number of posts, Set the Default Value of an Input on a Start Form - Appian 23.1, but under the Process Modeler I do not see a "process start form" mentioned in step 3, nor am I prompted import rule inputs as in step 4.  All I see is the Start node and there are no relevant configuration options.
One thread mentioned the use of the statProcessLink, but I don't see how to configure the Create action button from the records list and thus I don't see any way to add context parameters to the Create action.
Any help appreciated...
Thanks.

mikes0011 · Accepted Answer

Is this an example of what you're suggesting?

Not really - you would put it on your Submit button, not within the field itself.

a!buttonWidget(
  label: "Submit",
  value: "Submit",
  submit: true(),
  style: "PRIMARY",
  saveInto: {
    ri!buttonClicked,
    a!save(
      ri!record['recordType!{...}BWTA Event.fields.{...}user'],
      local!mySelectedUser
    )
  }
)

mikes0011 · Answer

The simpler approach here is to simply have the user picker field access, and save back into, the value of a local variable that you can declare to be the value of the loggedinuser upon form load - then at the time of submit click, use a single extra a!save() statement to save the current value of that local variable back into `ri!record['recordType!{...}BWTA Event.fields.{...}user']` (etc).

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