6 string references to user.data

ContactLinkTest::setUp in core/modules/contact/tests/src/Functional/Views/ContactLinkTest.php
Sets up the test.
MigrateUserContactSettingsTest::testUserContactSettings in core/modules/user/tests/src/Kernel/Migrate/d6/MigrateUserContactSettingsTest.php
Tests the Drupal6 user contact settings migration.
UserController::create in core/modules/user/src/Controller/UserController.php
UserData::create in core/modules/user/src/Plugin/views/field/UserData.php
UserData::create in core/modules/user/src/Plugin/migrate/destination/UserData.php
UserDataTest::testDataField in core/modules/user/tests/src/Kernel/Views/UserDataTest.php
Tests field handler.

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