How to add user-picker field for Jira custom plugin?

I’m creating a custom plugin for Jira (using Atlassian SDK).
I now have start date and end date fields.
How can I add a field to select the user for which the report will be generated?

Something like this
<atlassian-plugin … >
–<report name=“Creation Report” … >
—<properties.>
----<property.>
------<key.>startDate</key.>
------<name.>report.issuecreation.startdate</name.>.
------<description.>report.issuecreation.startdate.description</description.>
------<type.>date</type.>
----</property.>
----<property.>
------<key.>endDate</key.>
------<name.>report.issuecreation.enddate</name.>.
------<description.>report.issuecreation.enddate.description</description.>
------<type.>date</type.>
----</property.>
----<property.>
------<key.>user</key.>
------<name.>report.issuecreation.user</name.>.
------<description.>report.issuecreation.user.description</description.>
------<type.>userpicker</type.> ???
----</property.>
—</properties.>
</atlassian-plugin.>

Dear @ZaharPecherin !

According to this documentation (Object configurable parameters) you can use ‘user’ type for this.

Hope that helps!